Merge branch 'master' into consuming-apis-python

flask-connexion-rest-part-2/version_1/config.py

@@ -12,7 +12,7 @@ connex_app = connexion.App(__name__, specification_dir=basedir)
 app = connex_app.app
 
 # Build the Sqlite ULR for SqlAlchemy
-sqlite_url = "sqlite:////" + os.path.join(basedir, "people.db")
+sqlite_url = "sqlite:///" + os.path.join(basedir, "people.db")
 
 # Configure the SqlAlchemy part of the app instance
 app.config["SQLALCHEMY_ECHO"] = True

python-bindings/overview_article/cmult.c

@@ -4,7 +4,7 @@
 
 float cmult(int int_param, float float_param) {
     float return_value = int_param * float_param;
-    printf("    In cmult : int: %d float %.1f returning  %.1f\n", int_param,
+    printf("    In cmult : int %d float %.1f returning  %.1f\n", int_param,
             float_param, return_value);
     return return_value;
 }

python-bindings/overview_article/cppmult.cpp

@@ -6,7 +6,7 @@
 float cppmult(int int_param, float float_param) {
     float return_value = int_param * float_param;
     std::cout << std::setprecision(1) << std::fixed
-	          << "    In cppmul: int: " << int_param
+	          << "    In cppmul: int " << int_param
 	          << " float " <<  float_param
 	          << " returning  " << return_value
 	          << std::endl;

python-menus-toolbars/sample-app.py

@@ -199,7 +199,7 @@ class Window(QMainWindow):
 
     def pasteContent(self):
         # Logic for pasting content goes here...
-        self.centralWidget.setText("<b>Edit > Pate</b> clicked")
+        self.centralWidget.setText("<b>Edit > Paste</b> clicked")
 
     def cutContent(self):
         # Logic for cutting content goes here...

python-microservices-with-grpc/README.md

+# Running the Example
+
+1. Install Docker if you haven't already.
+2. Run `./build_and_run.sh`.

python-microservices-with-grpc/build_and_run.sh

+#!/bin/bash
+
+./gen_certs.sh
+
+DOCKER_BUILDKIT=1 docker build . -f marketplace/Dockerfile -t marketplace --secret id=ca.key,src=ca.key
+DOCKER_BUILDKIT=1 docker build . -f recommendations/Dockerfile -t recommendations --secret id=ca.key,src=ca.key
+
+docker-compose up

python-microservices-with-grpc/docker-compose.yaml

+version: "3.8"
+services:
+
+    marketplace:
+        environment:
+            RECOMMENDATIONS_HOST: recommendations
+        # DOCKER_BUILDKIT=1 docker build . -f marketplace/Dockerfile \
+        #                   -t marketplace --secret id=ca.key,src=ca.key
+        image: marketplace
+        networks:
+            - microservices
+        ports:
+            - 5000:5000
+
+    recommendations:
+        # DOCKER_BUILDKIT=1 docker build . -f recommendations/Dockerfile \
+        #                   -t recommendations --secret id=ca.key,src=ca.key
+        image: recommendations
+        networks:
+            - microservices
+
+networks:
+    microservices:

python-microservices-with-grpc/gen_certs.sh

+#!/bin/bash
+
+# Generate CA key and self-signed cert
+openssl req -x509 -nodes -newkey rsa:4096 -keyout ca.key -out ca.pem -subj /O=me
+
+# Generate a private key and certificate signing request for the client and server
+openssl req -nodes -newkey rsa:4096 -keyout client.key -out client.csr -subj /CN=marketplace
+openssl req -nodes -newkey rsa:4096 -keyout server.key -out server.csr -subj /CN=recommendations
+
+# Sign the client and server certs with the CA cert
+openssl x509 -req -in client.csr -CA ca.pem -CAkey ca.key -set_serial 1 -out client.pem
+openssl x509 -req -in server.csr -CA ca.pem -CAkey ca.key -set_serial 1 -out server.pem

python-microservices-with-grpc/integration_tests.sh

+#!/bin/bash
+
+set -euo pipefail
+
+docker-compose up -d
+trap "docker-compose down" EXIT
+
+sleep 5  # Give the services time to warm up
+docker-compose exec marketplace pytest

python-microservices-with-grpc/kubernetes.yaml

+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+    name: marketplace
+    labels:
+        app: marketplace
+spec:
+    replicas: 1
+    selector:
+        matchLabels:
+            app: marketplace
+    template:
+        metadata:
+            labels:
+                app: marketplace
+        spec:
+            containers:
+                - name: marketplace
+                  image: hidan/python-microservices-article-marketplace:0.1
+                  env:
+                      - name: RECOMMENDATIONS_HOST
+                        value: recommendations
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+    name: recommendations
+    labels:
+        app: recommendations
+spec:
+    replicas: 1
+    selector:
+        matchLabels:
+            app: recommendations
+    template:
+        metadata:
+            labels:
+                app: recommendations
+        spec:
+            containers:
+                - name: recommendations
+                  image: hidan/python-microservices-article-recommendations:0.1
+---
+apiVersion: v1
+kind: Service
+metadata:
+    name: recommendations
+spec:
+    selector:
+        app: recommendations
+    ports:
+        - protocol: TCP
+          port: 50051
+          targetPort: 50051
+---
+apiVersion: v1
+kind: Service
+metadata:
+    name: marketplace
+spec:
+    type: LoadBalancer
+    selector:
+        app: marketplace
+    ports:
+        - protocol: TCP
+          port: 5000
+          targetPort: 5000

python-microservices-with-grpc/marketplace/Dockerfile

+# syntax = docker/dockerfile:1.0-experimental
+# DOCKER_BUILDKIT=1 docker build . -f marketplace/Dockerfile -t marketplace --secret id=ca.key,src=ca.key
+
+FROM python
+
+RUN mkdir /service
+COPY protobufs/ /service/protobufs/
+COPY marketplace/ /service/marketplace/
+COPY ca.pem /service/marketplace/
+
+WORKDIR /service/marketplace
+RUN pip install -r requirements.txt
+RUN python -m grpc_tools.protoc -I ../protobufs --python_out=. \
+           --grpc_python_out=. ../protobufs/recommendations.proto
+RUN openssl req -nodes -newkey rsa:4096 -subj /CN=marketplace \
+                -keyout client.key -out client.csr
+RUN --mount=type=secret,id=ca.key \
+    openssl x509 -req -in client.csr -CA ca.pem -CAkey /run/secrets/ca.key \
+                 -set_serial 1 -out client.pem
+
+EXPOSE 5000
+ENV FLASK_APP=marketplace.py
+ENTRYPOINT [ "flask", "run", "--host=0.0.0.0"]

python-microservices-with-grpc/marketplace/marketplace.py

+import os
+
+from flask import Flask, render_template
+import grpc
+
+from recommendations_pb2 import BookCategory, RecommendationRequest
+from recommendations_pb2_grpc import RecommendationsStub
+
+app = Flask(__name__)
+
+recommendations_host = os.getenv("RECOMMENDATIONS_HOST", "localhost")
+with open("client.key", "rb") as fp:
+    client_key = fp.read()
+with open("client.pem", "rb") as fp:
+    client_cert = fp.read()
+with open("ca.pem", "rb") as fp:
+    ca_cert = fp.read()
+creds = grpc.ssl_channel_credentials(ca_cert, client_key, client_cert)
+recommendations_channel = grpc.secure_channel(
+    f"{recommendations_host}:443", creds
+)
+recommendations_client = RecommendationsStub(recommendations_channel)
+
+
+@app.route("/")
+def render_homepage():
+    recommendations_request = RecommendationRequest(
+        user_id=1, category=BookCategory.MYSTERY, max_results=3
+    )
+    recommendations_response = recommendations_client.Recommend(
+        recommendations_request
+    )
+    return render_template(
+        "homepage.html",
+        recommendations=recommendations_response.recommendations,
+    )

python-microservices-with-grpc/marketplace/marketplace_integration_test.py

+from urllib.request import urlopen
+
+
+def test_render_homepage():
+    homepage_html = urlopen("http://localhost:5000").read().decode("utf-8")
+    assert "<title>Online Books For You</title>" in homepage_html
+    assert homepage_html.count("<li>") == 3

python-microservices-with-grpc/marketplace/recommendations_pb2.py

+# -*- coding: utf-8 -*-
+# flake8: noqa
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: recommendations.proto
+
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+    name="recommendations.proto",
+    package="",
+    syntax="proto3",
+    serialized_options=None,
+    serialized_pb=b'\n\x15recommendations.proto"^\n\x15RecommendationRequest\x12\x0f\n\x07user_id\x18\x01 \x01(\x05\x12\x1f\n\x08\x63\x61tegory\x18\x02 \x01(\x0e\x32\r.BookCategory\x12\x13\n\x0bmax_results\x18\x03 \x01(\x05"/\n\x12\x42ookRecommendation\x12\n\n\x02id\x18\x01 \x01(\x05\x12\r\n\x05title\x18\x02 \x01(\t"F\n\x16RecommendationResponse\x12,\n\x0frecommendations\x18\x01 \x03(\x0b\x32\x13.BookRecommendation*?\n\x0c\x42ookCategory\x12\x0b\n\x07MYSTERY\x10\x00\x12\x13\n\x0fSCIENCE_FICTION\x10\x01\x12\r\n\tSELF_HELP\x10\x02\x32O\n\x0fRecommendations\x12<\n\tRecommend\x12\x16.RecommendationRequest\x1a\x17.RecommendationResponseb\x06proto3',
+)
+
+_BOOKCATEGORY = _descriptor.EnumDescriptor(
+    name="BookCategory",
+    full_name="BookCategory",
+    filename=None,
+    file=DESCRIPTOR,
+    values=[
+        _descriptor.EnumValueDescriptor(
+            name="MYSTERY",
+            index=0,
+            number=0,
+            serialized_options=None,
+            type=None,
+        ),
+        _descriptor.EnumValueDescriptor(
+            name="SCIENCE_FICTION",
+            index=1,
+            number=1,
+            serialized_options=None,
+            type=None,
+        ),
+        _descriptor.EnumValueDescriptor(
+            name="SELF_HELP",
+            index=2,
+            number=2,
+            serialized_options=None,
+            type=None,
+        ),
+    ],
+    containing_type=None,
+    serialized_options=None,
+    serialized_start=242,
+    serialized_end=305,
+)
+_sym_db.RegisterEnumDescriptor(_BOOKCATEGORY)
+
+BookCategory = enum_type_wrapper.EnumTypeWrapper(_BOOKCATEGORY)
+MYSTERY = 0
+SCIENCE_FICTION = 1
+SELF_HELP = 2
+
+
+_RECOMMENDATIONREQUEST = _descriptor.Descriptor(
+    name="RecommendationRequest",
+    full_name="RecommendationRequest",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="user_id",
+            full_name="RecommendationRequest.user_id",
+            index=0,
+            number=1,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="category",
+            full_name="RecommendationRequest.category",
+            index=1,
+            number=2,
+            type=14,
+            cpp_type=8,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="max_results",
+            full_name="RecommendationRequest.max_results",
+            index=2,
+            number=3,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=25,
+    serialized_end=119,
+)
+
+
+_BOOKRECOMMENDATION = _descriptor.Descriptor(
+    name="BookRecommendation",
+    full_name="BookRecommendation",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="id",
+            full_name="BookRecommendation.id",
+            index=0,
+            number=1,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="title",
+            full_name="BookRecommendation.title",
+            index=1,
+            number=2,
+            type=9,
+            cpp_type=9,
+            label=1,
+            has_default_value=False,
+            default_value=b"".decode("utf-8"),
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=121,
+    serialized_end=168,
+)
+
+
+_RECOMMENDATIONRESPONSE = _descriptor.Descriptor(
+    name="RecommendationResponse",
+    full_name="RecommendationResponse",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="recommendations",
+            full_name="RecommendationResponse.recommendations",
+            index=0,
+            number=1,
+            type=11,
+            cpp_type=10,
+            label=3,
+            has_default_value=False,
+            default_value=[],
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=170,
+    serialized_end=240,
+)
+
+_RECOMMENDATIONREQUEST.fields_by_name["category"].enum_type = _BOOKCATEGORY
+_RECOMMENDATIONRESPONSE.fields_by_name[
+    "recommendations"
+].message_type = _BOOKRECOMMENDATION
+DESCRIPTOR.message_types_by_name[
+    "RecommendationRequest"
+] = _RECOMMENDATIONREQUEST
+DESCRIPTOR.message_types_by_name["BookRecommendation"] = _BOOKRECOMMENDATION
+DESCRIPTOR.message_types_by_name[
+    "RecommendationResponse"
+] = _RECOMMENDATIONRESPONSE
+DESCRIPTOR.enum_types_by_name["BookCategory"] = _BOOKCATEGORY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+RecommendationRequest = _reflection.GeneratedProtocolMessageType(
+    "RecommendationRequest",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _RECOMMENDATIONREQUEST,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:RecommendationRequest)
+    },
+)
+_sym_db.RegisterMessage(RecommendationRequest)
+
+BookRecommendation = _reflection.GeneratedProtocolMessageType(
+    "BookRecommendation",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _BOOKRECOMMENDATION,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:BookRecommendation)
+    },
+)
+_sym_db.RegisterMessage(BookRecommendation)
+
+RecommendationResponse = _reflection.GeneratedProtocolMessageType(
+    "RecommendationResponse",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _RECOMMENDATIONRESPONSE,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:RecommendationResponse)
+    },
+)
+_sym_db.RegisterMessage(RecommendationResponse)
+
+
+_RECOMMENDATIONS = _descriptor.ServiceDescriptor(
+    name="Recommendations",
+    full_name="Recommendations",
+    file=DESCRIPTOR,
+    index=0,
+    serialized_options=None,
+    serialized_start=307,
+    serialized_end=386,
+    methods=[
+        _descriptor.MethodDescriptor(
+            name="Recommend",
+            full_name="Recommendations.Recommend",
+            index=0,
+            containing_service=None,
+            input_type=_RECOMMENDATIONREQUEST,
+            output_type=_RECOMMENDATIONRESPONSE,
+            serialized_options=None,
+        ),
+    ],
+)
+_sym_db.RegisterServiceDescriptor(_RECOMMENDATIONS)
+
+DESCRIPTOR.services_by_name["Recommendations"] = _RECOMMENDATIONS
+
+# @@protoc_insertion_point(module_scope)

python-microservices-with-grpc/marketplace/recommendations_pb2_grpc.py

+# flake8: noqa
+# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
+import grpc
+
+import recommendations_pb2 as recommendations__pb2
+
+
+class RecommendationsStub(object):
+    """Missing associated documentation comment in .proto file"""
+
+    def __init__(self, channel):
+        """Constructor.
+
+        Args:
+            channel: A grpc.Channel.
+        """
+        self.Recommend = channel.unary_unary(
+            "/Recommendations/Recommend",
+            request_serializer=recommendations__pb2.RecommendationRequest.SerializeToString,
+            response_deserializer=recommendations__pb2.RecommendationResponse.FromString,
+        )
+
+
+class RecommendationsServicer(object):
+    """Missing associated documentation comment in .proto file"""
+
+    def Recommend(self, request, context):
+        """Missing associated documentation comment in .proto file"""
+        context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+        context.set_details("Method not implemented!")
+        raise NotImplementedError("Method not implemented!")
+
+
+def add_RecommendationsServicer_to_server(servicer, server):
+    rpc_method_handlers = {
+        "Recommend": grpc.unary_unary_rpc_method_handler(
+            servicer.Recommend,
+            request_deserializer=recommendations__pb2.RecommendationRequest.FromString,
+            response_serializer=recommendations__pb2.RecommendationResponse.SerializeToString,
+        ),
+    }
+    generic_handler = grpc.method_handlers_generic_handler(
+        "Recommendations", rpc_method_handlers
+    )
+    server.add_generic_rpc_handlers((generic_handler,))
+
+
+# This class is part of an EXPERIMENTAL API.
+class Recommendations(object):
+    """Missing associated documentation comment in .proto file"""
+
+    @staticmethod
+    def Recommend(
+        request,
+        target,
+        options=(),
+        channel_credentials=None,
+        call_credentials=None,
+        compression=None,
+        wait_for_ready=None,
+        timeout=None,
+        metadata=None,
+    ):
+        return grpc.experimental.unary_unary(
+            request,
+            target,
+            "/Recommendations/Recommend",
+            recommendations__pb2.RecommendationRequest.SerializeToString,
+            recommendations__pb2.RecommendationResponse.FromString,
+            options,
+            channel_credentials,
+            call_credentials,
+            compression,
+            wait_for_ready,
+            timeout,
+            metadata,
+        )

python-microservices-with-grpc/marketplace/requirements.txt

+flask ~= 1.1
+grpcio-tools ~= 1.30
+Jinja2 ~= 2.11
+pytest ~= 5.4

python-microservices-with-grpc/marketplace/templates/homepage.html

+<!doctype html>
+<html lang="en">
+<head>
+    <title>Online Books For You</title>
+</head>
+<body>
+    <h1>Mystery books you may like</h1>
+    <ul>
+    {% for book in recommendations %}
+        <li>{{ book.title }}</li>
+    {% endfor %}
+    </ul>
+</body>

python-microservices-with-grpc/protobufs/recommendations.proto

+syntax = "proto3";
+
+enum BookCategory {
+    MYSTERY = 0;
+    SCIENCE_FICTION = 1;
+    SELF_HELP = 2;
+}
+
+message RecommendationRequest {
+    int32 user_id = 1;
+    BookCategory category = 2;
+    int32 max_results = 3;
+}
+
+message BookRecommendation {
+    int32 id = 1;
+    string title = 2;
+}
+
+message RecommendationResponse {
+    repeated BookRecommendation recommendations = 1;
+}
+
+service Recommendations {
+    rpc Recommend (RecommendationRequest) returns (RecommendationResponse);
+}

python-microservices-with-grpc/recommendations/Dockerfile

+# syntax = docker/dockerfile:1.0-experimental
+# DOCKER_BUILDKIT=1 docker build . -f recommendations/Dockerfile -t recommendations --secret id=ca.key,src=ca.key
+
+FROM python
+
+RUN mkdir /service
+COPY protobufs/ /service/protobufs/
+COPY recommendations/ /service/recommendations/
+COPY ca.pem /service/recommendations/
+
+WORKDIR /service/recommendations
+RUN pip install -r requirements.txt
+RUN python -m grpc_tools.protoc -I ../protobufs --python_out=. \
+           --grpc_python_out=. ../protobufs/recommendations.proto
+RUN openssl req -nodes -newkey rsa:4096 -subj /CN=recommendations \
+                -keyout server.key -out server.csr
+RUN --mount=type=secret,id=ca.key \
+    openssl x509 -req -in server.csr -CA ca.pem -CAkey /run/secrets/ca.key \
+                 -set_serial 1 -out server.pem
+
+EXPOSE 50051
+ENTRYPOINT [ "python", "recommendations.py" ]

python-microservices-with-grpc/recommendations/recommendations.py

+from concurrent import futures
+import random
+
+import grpc
+from grpc_interceptor import ExceptionToStatusInterceptor
+from grpc_interceptor.exceptions import NotFound
+
+from recommendations_pb2 import (
+    BookCategory,
+    BookRecommendation,
+    RecommendationResponse,
+)
+import recommendations_pb2_grpc
+
+books_by_category = {
+    BookCategory.MYSTERY: [
+        BookRecommendation(id=1, title="The Maltese Falcon"),
+        BookRecommendation(id=2, title="Murder on the Orient Express"),
+        BookRecommendation(id=3, title="The Hound of the Baskervilles"),
+    ],
+    BookCategory.SCIENCE_FICTION: [
+        BookRecommendation(id=4, title="The Hitchhiker's Guide To The Galaxy"),
+        BookRecommendation(id=5, title="Ender's Game"),
+        BookRecommendation(id=6, title="The Dune Chronicles"),
+    ],
+    BookCategory.SELF_HELP: [
+        BookRecommendation(
+            id=7, title="The 7 Habits of Highly Effective People"
+        ),
+        BookRecommendation(
+            id=8, title="How to Win Friends and Influence People"
+        ),
+        BookRecommendation(id=9, title="Man’s Search for Meaning"),
+    ],
+}
+
+
+class RecommendationService(recommendations_pb2_grpc.RecommendationsServicer):
+    def Recommend(self, request, context):
+        if request.category not in books_by_category:
+            raise NotFound("Category not found")
+
+        books_for_category = books_by_category[request.category]
+        num_results = min(request.max_results, len(books_for_category))
+        books_to_recommend = random.sample(books_for_category, num_results)
+
+        return RecommendationResponse(recommendations=books_to_recommend)
+
+
+def serve():
+    interceptors = [ExceptionToStatusInterceptor()]
+    server = grpc.server(
+        futures.ThreadPoolExecutor(max_workers=10), interceptors=interceptors
+    )
+    recommendations_pb2_grpc.add_RecommendationsServicer_to_server(
+        RecommendationService(), server
+    )
+
+    with open("server.key", "rb") as fp:
+        server_key = fp.read()
+    with open("server.pem", "rb") as fp:
+        server_cert = fp.read()
+    with open("ca.pem", "rb") as fp:
+        ca_cert = fp.read()
+
+    creds = grpc.ssl_server_credentials(
+        [(server_key, server_cert)],
+        root_certificates=ca_cert,
+        require_client_auth=True,
+    )
+    server.add_secure_port("[::]:443", creds)
+    server.start()
+    server.wait_for_termination()
+
+
+if __name__ == "__main__":
+    serve()

python-microservices-with-grpc/recommendations/recommendations_pb2.py

+# -*- coding: utf-8 -*-
+# flake8: noqa
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: recommendations.proto
+
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+    name="recommendations.proto",
+    package="",
+    syntax="proto3",
+    serialized_options=None,
+    serialized_pb=b'\n\x15recommendations.proto"^\n\x15RecommendationRequest\x12\x0f\n\x07user_id\x18\x01 \x01(\x05\x12\x1f\n\x08\x63\x61tegory\x18\x02 \x01(\x0e\x32\r.BookCategory\x12\x13\n\x0bmax_results\x18\x03 \x01(\x05"/\n\x12\x42ookRecommendation\x12\n\n\x02id\x18\x01 \x01(\x05\x12\r\n\x05title\x18\x02 \x01(\t"F\n\x16RecommendationResponse\x12,\n\x0frecommendations\x18\x01 \x03(\x0b\x32\x13.BookRecommendation*?\n\x0c\x42ookCategory\x12\x0b\n\x07MYSTERY\x10\x00\x12\x13\n\x0fSCIENCE_FICTION\x10\x01\x12\r\n\tSELF_HELP\x10\x02\x32O\n\x0fRecommendations\x12<\n\tRecommend\x12\x16.RecommendationRequest\x1a\x17.RecommendationResponseb\x06proto3',
+)
+
+_BOOKCATEGORY = _descriptor.EnumDescriptor(
+    name="BookCategory",
+    full_name="BookCategory",
+    filename=None,
+    file=DESCRIPTOR,
+    values=[
+        _descriptor.EnumValueDescriptor(
+            name="MYSTERY",
+            index=0,
+            number=0,
+            serialized_options=None,
+            type=None,
+        ),
+        _descriptor.EnumValueDescriptor(
+            name="SCIENCE_FICTION",
+            index=1,
+            number=1,
+            serialized_options=None,
+            type=None,
+        ),
+        _descriptor.EnumValueDescriptor(
+            name="SELF_HELP",
+            index=2,
+            number=2,
+            serialized_options=None,
+            type=None,
+        ),
+    ],
+    containing_type=None,
+    serialized_options=None,
+    serialized_start=242,
+    serialized_end=305,
+)
+_sym_db.RegisterEnumDescriptor(_BOOKCATEGORY)
+
+BookCategory = enum_type_wrapper.EnumTypeWrapper(_BOOKCATEGORY)
+MYSTERY = 0
+SCIENCE_FICTION = 1
+SELF_HELP = 2
+
+
+_RECOMMENDATIONREQUEST = _descriptor.Descriptor(
+    name="RecommendationRequest",
+    full_name="RecommendationRequest",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="user_id",
+            full_name="RecommendationRequest.user_id",
+            index=0,
+            number=1,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="category",
+            full_name="RecommendationRequest.category",
+            index=1,
+            number=2,
+            type=14,
+            cpp_type=8,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="max_results",
+            full_name="RecommendationRequest.max_results",
+            index=2,
+            number=3,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=25,
+    serialized_end=119,
+)
+
+
+_BOOKRECOMMENDATION = _descriptor.Descriptor(
+    name="BookRecommendation",
+    full_name="BookRecommendation",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="id",
+            full_name="BookRecommendation.id",
+            index=0,
+            number=1,
+            type=5,
+            cpp_type=1,
+            label=1,
+            has_default_value=False,
+            default_value=0,
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+        _descriptor.FieldDescriptor(
+            name="title",
+            full_name="BookRecommendation.title",
+            index=1,
+            number=2,
+            type=9,
+            cpp_type=9,
+            label=1,
+            has_default_value=False,
+            default_value=b"".decode("utf-8"),
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=121,
+    serialized_end=168,
+)
+
+
+_RECOMMENDATIONRESPONSE = _descriptor.Descriptor(
+    name="RecommendationResponse",
+    full_name="RecommendationResponse",
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name="recommendations",
+            full_name="RecommendationResponse.recommendations",
+            index=0,
+            number=1,
+            type=11,
+            cpp_type=10,
+            label=3,
+            has_default_value=False,
+            default_value=[],
+            message_type=None,
+            enum_type=None,
+            containing_type=None,
+            is_extension=False,
+            extension_scope=None,
+            serialized_options=None,
+            file=DESCRIPTOR,
+        ),
+    ],
+    extensions=[],
+    nested_types=[],
+    enum_types=[],
+    serialized_options=None,
+    is_extendable=False,
+    syntax="proto3",
+    extension_ranges=[],
+    oneofs=[],
+    serialized_start=170,
+    serialized_end=240,
+)
+
+_RECOMMENDATIONREQUEST.fields_by_name["category"].enum_type = _BOOKCATEGORY
+_RECOMMENDATIONRESPONSE.fields_by_name[
+    "recommendations"
+].message_type = _BOOKRECOMMENDATION
+DESCRIPTOR.message_types_by_name[
+    "RecommendationRequest"
+] = _RECOMMENDATIONREQUEST
+DESCRIPTOR.message_types_by_name["BookRecommendation"] = _BOOKRECOMMENDATION
+DESCRIPTOR.message_types_by_name[
+    "RecommendationResponse"
+] = _RECOMMENDATIONRESPONSE
+DESCRIPTOR.enum_types_by_name["BookCategory"] = _BOOKCATEGORY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+RecommendationRequest = _reflection.GeneratedProtocolMessageType(
+    "RecommendationRequest",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _RECOMMENDATIONREQUEST,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:RecommendationRequest)
+    },
+)
+_sym_db.RegisterMessage(RecommendationRequest)
+
+BookRecommendation = _reflection.GeneratedProtocolMessageType(
+    "BookRecommendation",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _BOOKRECOMMENDATION,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:BookRecommendation)
+    },
+)
+_sym_db.RegisterMessage(BookRecommendation)
+
+RecommendationResponse = _reflection.GeneratedProtocolMessageType(
+    "RecommendationResponse",
+    (_message.Message,),
+    {
+        "DESCRIPTOR": _RECOMMENDATIONRESPONSE,
+        "__module__": "recommendations_pb2"
+        # @@protoc_insertion_point(class_scope:RecommendationResponse)
+    },
+)
+_sym_db.RegisterMessage(RecommendationResponse)
+
+
+_RECOMMENDATIONS = _descriptor.ServiceDescriptor(
+    name="Recommendations",
+    full_name="Recommendations",
+    file=DESCRIPTOR,
+    index=0,
+    serialized_options=None,
+    serialized_start=307,
+    serialized_end=386,
+    methods=[
+        _descriptor.MethodDescriptor(
+            name="Recommend",
+            full_name="Recommendations.Recommend",
+            index=0,
+            containing_service=None,
+            input_type=_RECOMMENDATIONREQUEST,
+            output_type=_RECOMMENDATIONRESPONSE,
+            serialized_options=None,
+        ),
+    ],
+)
+_sym_db.RegisterServiceDescriptor(_RECOMMENDATIONS)
+
+DESCRIPTOR.services_by_name["Recommendations"] = _RECOMMENDATIONS
+
+# @@protoc_insertion_point(module_scope)

python-microservices-with-grpc/recommendations/recommendations_pb2_grpc.py

+# flake8: noqa
+# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
+import grpc
+
+import recommendations_pb2 as recommendations__pb2
+
+
+class RecommendationsStub(object):
+    """Missing associated documentation comment in .proto file"""
+
+    def __init__(self, channel):
+        """Constructor.
+
+        Args:
+            channel: A grpc.Channel.
+        """
+        self.Recommend = channel.unary_unary(
+            "/Recommendations/Recommend",
+            request_serializer=recommendations__pb2.RecommendationRequest.SerializeToString,
+            response_deserializer=recommendations__pb2.RecommendationResponse.FromString,
+        )
+
+
+class RecommendationsServicer(object):
+    """Missing associated documentation comment in .proto file"""
+
+    def Recommend(self, request, context):
+        """Missing associated documentation comment in .proto file"""
+        context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+        context.set_details("Method not implemented!")
+        raise NotImplementedError("Method not implemented!")
+
+
+def add_RecommendationsServicer_to_server(servicer, server):
+    rpc_method_handlers = {
+        "Recommend": grpc.unary_unary_rpc_method_handler(
+            servicer.Recommend,
+            request_deserializer=recommendations__pb2.RecommendationRequest.FromString,
+            response_serializer=recommendations__pb2.RecommendationResponse.SerializeToString,
+        ),
+    }
+    generic_handler = grpc.method_handlers_generic_handler(
+        "Recommendations", rpc_method_handlers
+    )
+    server.add_generic_rpc_handlers((generic_handler,))
+
+
+# This class is part of an EXPERIMENTAL API.
+class Recommendations(object):
+    """Missing associated documentation comment in .proto file"""
+
+    @staticmethod
+    def Recommend(
+        request,
+        target,
+        options=(),
+        channel_credentials=None,
+        call_credentials=None,
+        compression=None,
+        wait_for_ready=None,
+        timeout=None,
+        metadata=None,
+    ):
+        return grpc.experimental.unary_unary(
+            request,
+            target,
+            "/Recommendations/Recommend",
+            recommendations__pb2.RecommendationRequest.SerializeToString,
+            recommendations__pb2.RecommendationResponse.FromString,
+            options,
+            channel_credentials,
+            call_credentials,
+            compression,
+            wait_for_ready,
+            timeout,
+            metadata,
+        )

python-microservices-with-grpc/recommendations/recommendations_test.py

+from recommendations import RecommendationService
+
+from recommendations_pb2 import BookCategory, RecommendationRequest
+
+
+def test_recommendations():
+    service = RecommendationService()
+    request = RecommendationRequest(
+        user_id=1, category=BookCategory.MYSTERY, max_results=1
+    )
+    response = service.Recommend(request, None)
+    assert len(response.recommendations) == 1

python-microservices-with-grpc/recommendations/requirements.txt

+grpc-interceptor ~= 0.11.0
+grpcio-tools ~= 1.30
+pytest ~= 5.4

python-web-applications/README.md

+# Python Web Applications: Deploy Your Script as a Flask App
+
+Code snippets supplementing the [Python Web Applications: Deploy Your Script as a Flask App](https://realpython.com/python-web-applications-update/) tutorial.
+
+## Running Locally
+
+Create and activate a Python virtual environment:
+
+```shell
+$ python -m venv venv
+$ source venv/bin/activate
+```
+
+Update `pip` and install the required dependencies:
+
+```shell
+(venv) $ pip install -U pip
+(venv) $ pip install -r requirements.txt
+```
+
+Start the Flask server:
+
+```shell
+(venv) $ python main.py
+ * Serving Flask app "main" (lazy loading)
+ * Environment: production
+   WARNING: This is a development server. Do not use it in a production deployment.
+   Use a production WSGI server instead.
+ * Debug mode: on
+ * Running on http://127.0.0.1:8080/ (Press CTRL+C to quit)
+ * Restarting with stat
+ * Debugger is active!
+ * Debugger PIN: 339-986-221
+```
+
+Navigate your web browser to this address: <http://127.0.0.1:8080/>

qt-designer-python/sample_editor/README.md

+# Sample Text Editor
+
+A **sample text editor** that shows how to use Qt Designer to create GUI applications.
+
+## How to Run this Application
+
+To run this application, you need to [install `PyQt5`](https://realpython.com/python-pyqt-gui-calculator/#installing-pyqt) on your Python environment. To do that, you can run the following commands in a terminal or command prompt:
+
+```sh
+$ python3 -m venv ./venv
+$ source venv/bin/activate
+(venv) $ pip install PyQt5
+```
+
+Once you have [PyQt](https://www.riverbankcomputing.com/static/Docs/PyQt5/) installed, you can run the application by executing the following command:
+
+```sh
+(venv) $ cd sample_editor/
+(venv) $ python app.py
+```
+
+This command will launch the application, so you'll be able to experiment with it.
+
+## About the Author
+
+Leodanis Pozo Ramos – [@lpozo78](https://twitter.com/lpozo78) – lpozor78@gmail.com
+
+## License
+
+The set of icons used in this application are part of the [TurkinOS](https://github.com/llamaret/turkinos-icon) icon theme, which is distributed under the [GPL v3.0 license](https://github.com/llamaret/turkinos-icon/blob/master/LICENSE). See `ui/resources/LICENSE` for details.
\ No newline at end of file

qt-designer-python/sample_editor/app.py

+import sys
+
+from PyQt5.QtWidgets import QApplication, QDialog, QMainWindow, QMessageBox
+from PyQt5.uic import loadUi
+
+from main_window_ui import Ui_MainWindow
+
+
+class Window(QMainWindow, Ui_MainWindow):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.setupUi(self)
+        self.connectSignalsSlots()
+
+    def connectSignalsSlots(self):
+        self.action_Exit.triggered.connect(self.close)
+        self.action_Find_Replace.triggered.connect(self.findAndReplace)
+        self.action_About.triggered.connect(self.about)
+
+    def findAndReplace(self):
+        dialog = FindReplaceDialog(self)
+        dialog.exec()
+
+    def about(self):
+        QMessageBox.about(
+            self,
+            "About Sample Editor",
+            "<p>A sample text editor app built with:</p>"
+            "<p>- PyQt</p>"
+            "<p>- Qt Designer</p>"
+            "<p>- Python</p>",
+        )
+
+
+class FindReplaceDialog(QDialog):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        loadUi("ui/find_replace.ui", self)
+
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    win = Window()
+    win.show()
+    sys.exit(app.exec())

qt-designer-python/sample_editor/main_window_ui.py

+# -*- coding: utf-8 -*-
+
+# Form implementation generated from reading ui file 'ui/main_window.ui'
+#
+# Created by: PyQt5 UI code generator 5.15.1
+#
+# WARNING: Any manual changes made to this file will be lost when pyuic5 is
+# run again.  Do not edit this file unless you know what you are doing.
+
+
+from PyQt5 import QtCore, QtGui, QtWidgets
+
+
+class Ui_MainWindow(object):
+    def setupUi(self, MainWindow):
+        MainWindow.setObjectName("MainWindow")
+        MainWindow.resize(413, 299)
+        self.centralwidget = QtWidgets.QWidget(MainWindow)
+        self.centralwidget.setObjectName("centralwidget")
+        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
+        self.verticalLayout.setContentsMargins(1, 1, 1, 1)
+        self.verticalLayout.setObjectName("verticalLayout")
+        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
+        self.textEdit.setObjectName("textEdit")
+        self.verticalLayout.addWidget(self.textEdit)
+        MainWindow.setCentralWidget(self.centralwidget)
+        self.menubar = QtWidgets.QMenuBar(MainWindow)
+        self.menubar.setGeometry(QtCore.QRect(0, 0, 413, 20))
+        self.menubar.setObjectName("menubar")
+        self.menu_File = QtWidgets.QMenu(self.menubar)
+        self.menu_File.setObjectName("menu_File")
+        self.menuOpen_Recent = QtWidgets.QMenu(self.menu_File)
+        self.menuOpen_Recent.setObjectName("menuOpen_Recent")
+        self.menu_Edit = QtWidgets.QMenu(self.menubar)
+        self.menu_Edit.setObjectName("menu_Edit")
+        self.menu_Help = QtWidgets.QMenu(self.menubar)
+        self.menu_Help.setObjectName("menu_Help")
+        MainWindow.setMenuBar(self.menubar)
+        self.statusbar = QtWidgets.QStatusBar(MainWindow)
+        self.statusbar.setObjectName("statusbar")
+        MainWindow.setStatusBar(self.statusbar)
+        self.toolBar = QtWidgets.QToolBar(MainWindow)
+        self.toolBar.setObjectName("toolBar")
+        MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar)
+        self.action_New = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon()
+        icon.addPixmap(
+            QtGui.QPixmap("ui/resources/file-new.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_New.setIcon(icon)
+        self.action_New.setObjectName("action_New")
+        self.action_Open = QtWidgets.QAction(MainWindow)
+        icon1 = QtGui.QIcon()
+        icon1.addPixmap(
+            QtGui.QPixmap("ui/resources/file-open.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Open.setIcon(icon1)
+        self.action_Open.setObjectName("action_Open")
+        self.action_Save = QtWidgets.QAction(MainWindow)
+        icon2 = QtGui.QIcon()
+        icon2.addPixmap(
+            QtGui.QPixmap("ui/resources/file-save.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Save.setIcon(icon2)
+        self.action_Save.setObjectName("action_Save")
+        self.action_Exit = QtWidgets.QAction(MainWindow)
+        icon3 = QtGui.QIcon()
+        icon3.addPixmap(
+            QtGui.QPixmap("ui/resources/file-exit.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Exit.setIcon(icon3)
+        self.action_Exit.setObjectName("action_Exit")
+        self.action_Copy = QtWidgets.QAction(MainWindow)
+        icon4 = QtGui.QIcon()
+        icon4.addPixmap(
+            QtGui.QPixmap("ui/resources/edit-copy.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Copy.setIcon(icon4)
+        self.action_Copy.setObjectName("action_Copy")
+        self.action_Paste = QtWidgets.QAction(MainWindow)
+        icon5 = QtGui.QIcon()
+        icon5.addPixmap(
+            QtGui.QPixmap("ui/resources/edit-paste.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Paste.setIcon(icon5)
+        self.action_Paste.setObjectName("action_Paste")
+        self.action_Cut = QtWidgets.QAction(MainWindow)
+        icon6 = QtGui.QIcon()
+        icon6.addPixmap(
+            QtGui.QPixmap("ui/resources/edit-cut.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_Cut.setIcon(icon6)
+        self.action_Cut.setObjectName("action_Cut")
+        self.actionOpen_All = QtWidgets.QAction(MainWindow)
+        self.actionOpen_All.setObjectName("actionOpen_All")
+        self.action_About = QtWidgets.QAction(MainWindow)
+        icon7 = QtGui.QIcon()
+        icon7.addPixmap(
+            QtGui.QPixmap("ui/resources/help-content.png"),
+            QtGui.QIcon.Normal,
+            QtGui.QIcon.Off,
+        )
+        self.action_About.setIcon(icon7)
+        self.action_About.setObjectName("action_About")
+        self.action_Find_Replace = QtWidgets.QAction(MainWindow)
+        self.action_Find_Replace.setObjectName("action_Find_Replace")
+        self.menuOpen_Recent.addAction(self.actionOpen_All)
+        self.menu_File.addAction(self.action_New)
+        self.menu_File.addSeparator()
+        self.menu_File.addAction(self.action_Open)
+        self.menu_File.addAction(self.menuOpen_Recent.menuAction())
+        self.menu_File.addSeparator()
+        self.menu_File.addAction(self.action_Save)
+        self.menu_File.addSeparator()
+        self.menu_File.addAction(self.action_Exit)
+        self.menu_Edit.addAction(self.action_Copy)
+        self.menu_Edit.addAction(self.action_Paste)
+        self.menu_Edit.addAction(self.action_Cut)
+        self.menu_Edit.addSeparator()
+        self.menu_Edit.addAction(self.action_Find_Replace)
+        self.menu_Help.addAction(self.action_About)
+        self.menubar.addAction(self.menu_File.menuAction())
+        self.menubar.addAction(self.menu_Edit.menuAction())
+        self.menubar.addAction(self.menu_Help.menuAction())
+        self.toolBar.addAction(self.action_New)
+        self.toolBar.addSeparator()
+        self.toolBar.addAction(self.action_Open)
+        self.toolBar.addSeparator()
+        self.toolBar.addAction(self.action_Save)
+        self.toolBar.addSeparator()
+        self.toolBar.addAction(self.action_Copy)
+        self.toolBar.addAction(self.action_Paste)
+        self.toolBar.addAction(self.action_Cut)
+        self.toolBar.addSeparator()
+        self.toolBar.addAction(self.action_About)
+
+        self.retranslateUi(MainWindow)
+        QtCore.QMetaObject.connectSlotsByName(MainWindow)
+
+    def retranslateUi(self, MainWindow):
+        _translate = QtCore.QCoreApplication.translate
+        MainWindow.setWindowTitle(_translate("MainWindow", "Sample Editor"))
+        self.menu_File.setTitle(_translate("MainWindow", "&File"))
+        self.menuOpen_Recent.setTitle(_translate("MainWindow", "Open &Recent"))
+        self.menu_Edit.setTitle(_translate("MainWindow", "&Edit"))
+        self.menu_Help.setTitle(_translate("MainWindow", "&Help"))
+        self.toolBar.setWindowTitle(_translate("MainWindow", "toolBar"))
+        self.action_New.setText(_translate("MainWindow", "&New..."))
+        self.action_New.setToolTip(
+            _translate("MainWindow", "Create a New Document")
+        )
+        self.action_New.setShortcut(_translate("MainWindow", "Ctrl+N"))
+        self.action_Open.setText(_translate("MainWindow", "&Open..."))
+        self.action_Open.setToolTip(
+            _translate("MainWindow", "Open a Document")
+        )
+        self.action_Open.setShortcut(_translate("MainWindow", "Ctrl+O"))
+        self.action_Save.setText(_translate("MainWindow", "&Save"))
+        self.action_Save.setToolTip(
+            _translate("MainWindow", "Save the Current Document")
+        )
+        self.action_Save.setShortcut(_translate("MainWindow", "Ctrl+S"))
+        self.action_Exit.setText(_translate("MainWindow", "&Exit"))
+        self.action_Copy.setText(_translate("MainWindow", "&Copy"))
+        self.action_Copy.setToolTip(
+            _translate("MainWindow", "Copy Slected Text")
+        )
+        self.action_Copy.setShortcut(_translate("MainWindow", "Ctrl+C"))
+        self.action_Paste.setText(_translate("MainWindow", "&Paste"))
+        self.action_Paste.setToolTip(
+            _translate("MainWindow", "Paste Copied Text")
+        )
+        self.action_Paste.setShortcut(_translate("MainWindow", "Ctrl+V"))
+        self.action_Cut.setText(_translate("MainWindow", "C&ut"))
+        self.action_Cut.setToolTip(
+            _translate("MainWindow", "Cut Selected Text")
+        )
+        self.action_Cut.setShortcut(_translate("MainWindow", "Ctrl+X"))
+        self.actionOpen_All.setText(_translate("MainWindow", "Open All"))
+        self.actionOpen_All.setToolTip(
+            _translate("MainWindow", "Open All Recent Documents")
+        )
+        self.action_About.setText(_translate("MainWindow", "&About..."))
+        self.action_Find_Replace.setText(
+            _translate("MainWindow", "&Find and Replace...")
+        )
+        self.action_Find_Replace.setToolTip(
+            _translate("MainWindow", "Launch Find and Replace Dialog")
+        )
+        self.action_Find_Replace.setShortcut(
+            _translate("MainWindow", "Ctrl+F")
+        )

qt-designer-python/sample_editor/ui/find_replace.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>389</width>
+    <height>132</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Find and Replace</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <item>
+    <layout class="QGridLayout" name="gridLayout">
+     <item row="0" column="0">
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>F&amp;ind:</string>
+       </property>
+       <property name="buddy">
+        <cstring>lineEdit</cstring>
+       </property>
+      </widget>
+     </item>
+     <item row="0" column="1">
+      <widget class="QLineEdit" name="lineEdit"/>
+     </item>
+     <item row="1" column="0">
+      <widget class="QLabel" name="label_2">
+       <property name="text">
+        <string>Re&amp;place:</string>
+       </property>
+       <property name="buddy">
+        <cstring>lineEdit_2</cstring>
+       </property>
+      </widget>
+     </item>
+     <item row="1" column="1">
+      <widget class="QLineEdit" name="lineEdit_2"/>
+     </item>
+     <item row="2" column="0" colspan="2">
+      <widget class="QCheckBox" name="checkBox">
+       <property name="text">
+        <string>Match &amp;Case</string>
+       </property>
+      </widget>
+     </item>
+     <item row="3" column="0" colspan="2">
+      <widget class="QCheckBox" name="checkBox_2">
+       <property name="text">
+        <string>Match Whole &amp;Word</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QPushButton" name="pushButton">
+       <property name="text">
+        <string>&amp;Find</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_2">
+       <property name="text">
+        <string>&amp;Replace</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>40</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QPushButton" name="pushButton_3">
+       <property name="text">
+        <string>&amp;Cancel</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <tabstops>
+  <tabstop>lineEdit</tabstop>
+  <tabstop>lineEdit_2</tabstop>
+  <tabstop>pushButton</tabstop>
+  <tabstop>pushButton_2</tabstop>
+  <tabstop>checkBox</tabstop>
+  <tabstop>checkBox_2</tabstop>
+  <tabstop>pushButton_3</tabstop>
+ </tabstops>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>pushButton_3</sender>
+   <signal>clicked()</signal>
+   <receiver>Dialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>302</x>
+     <y>102</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>328</x>
+     <y>67</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

qt-designer-python/sample_editor/ui/main_window.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>413</width>
+    <height>299</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Sample Editor</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <property name="leftMargin">
+     <number>1</number>
+    </property>
+    <property name="topMargin">
+     <number>1</number>
+    </property>
+    <property name="rightMargin">
+     <number>1</number>
+    </property>
+    <property name="bottomMargin">
+     <number>1</number>
+    </property>
+    <item>
+     <widget class="QTextEdit" name="textEdit"/>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>413</width>
+     <height>20</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menu_File">
+    <property name="title">
+     <string>&amp;File</string>
+    </property>
+    <widget class="QMenu" name="menuOpen_Recent">
+     <property name="title">
+      <string>Open &amp;Recent</string>
+     </property>
+     <addaction name="actionOpen_All"/>
+    </widget>
+    <addaction name="action_New"/>
+    <addaction name="separator"/>
+    <addaction name="action_Open"/>
+    <addaction name="menuOpen_Recent"/>
+    <addaction name="separator"/>
+    <addaction name="action_Save"/>
+    <addaction name="separator"/>
+    <addaction name="action_Exit"/>
+   </widget>
+   <widget class="QMenu" name="menu_Edit">
+    <property name="title">
+     <string>&amp;Edit</string>
+    </property>
+    <addaction name="action_Copy"/>
+    <addaction name="action_Paste"/>
+    <addaction name="action_Cut"/>
+    <addaction name="separator"/>
+    <addaction name="action_Find_Replace"/>
+   </widget>
+   <widget class="QMenu" name="menu_Help">
+    <property name="title">
+     <string>&amp;Help</string>
+    </property>
+    <addaction name="action_About"/>
+   </widget>
+   <addaction name="menu_File"/>
+   <addaction name="menu_Edit"/>
+   <addaction name="menu_Help"/>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <widget class="QToolBar" name="toolBar">
+   <property name="windowTitle">
+    <string>toolBar</string>
+   </property>
+   <attribute name="toolBarArea">
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak">
+    <bool>false</bool>
+   </attribute>
+   <addaction name="action_New"/>
+   <addaction name="separator"/>
+   <addaction name="action_Open"/>
+   <addaction name="separator"/>
+   <addaction name="action_Save"/>
+   <addaction name="separator"/>
+   <addaction name="action_Copy"/>
+   <addaction name="action_Paste"/>
+   <addaction name="action_Cut"/>
+   <addaction name="separator"/>
+   <addaction name="action_About"/>
+  </widget>
+  <action name="action_New">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/file-new.png</normaloff>resources/file-new.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;New...</string>
+   </property>
+   <property name="toolTip">
+    <string>Create a New Document</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+N</string>
+   </property>
+  </action>
+  <action name="action_Open">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/file-open.png</normaloff>resources/file-open.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Open...</string>
+   </property>
+   <property name="toolTip">
+    <string>Open a Document</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+O</string>
+   </property>
+  </action>
+  <action name="action_Save">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/file-save.png</normaloff>resources/file-save.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Save</string>
+   </property>
+   <property name="toolTip">
+    <string>Save the Current Document</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+S</string>
+   </property>
+  </action>
+  <action name="action_Exit">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/file-exit.png</normaloff>resources/file-exit.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Exit</string>
+   </property>
+  </action>
+  <action name="action_Copy">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/edit-copy.png</normaloff>resources/edit-copy.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Copy</string>
+   </property>
+   <property name="toolTip">
+    <string>Copy Slected Text</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+C</string>
+   </property>
+  </action>
+  <action name="action_Paste">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/edit-paste.png</normaloff>resources/edit-paste.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;Paste</string>
+   </property>
+   <property name="toolTip">
+    <string>Paste Copied Text</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+V</string>
+   </property>
+  </action>
+  <action name="action_Cut">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/edit-cut.png</normaloff>resources/edit-cut.png</iconset>
+   </property>
+   <property name="text">
+    <string>C&amp;ut</string>
+   </property>
+   <property name="toolTip">
+    <string>Cut Selected Text</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+X</string>
+   </property>
+  </action>
+  <action name="actionOpen_All">
+   <property name="text">
+    <string>Open All</string>
+   </property>
+   <property name="toolTip">
+    <string>Open All Recent Documents</string>
+   </property>
+  </action>
+  <action name="action_About">
+   <property name="icon">
+    <iconset>
+     <normaloff>resources/help-content.png</normaloff>resources/help-content.png</iconset>
+   </property>
+   <property name="text">
+    <string>&amp;About...</string>
+   </property>
+  </action>
+  <action name="action_Find_Replace">
+   <property name="text">
+    <string>&amp;Find and Replace...</string>
+   </property>
+   <property name="toolTip">
+    <string>Launch Find and Replace Dialog</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+F</string>
+   </property>
+  </action>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

qt-designer-python/sample_editor/ui/resources/LICENSE.txt

+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
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+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
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+
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+
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+  "This License" refers to version 3 of the GNU General Public License.
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+  "Copyright" also means copyright-like laws that apply to other kinds of
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+  "The Program" refers to any copyrightable work licensed under this
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+  To "propagate" a work means to do anything with it that, without
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+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
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+extent that warranties are provided), that licensees may convey the
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+menu, a prominent item in the list meets this criterion.
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+  "Additional permissions" are terms that supplement the terms of this
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+  9. Acceptance Not Required for Having Copies.
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+  10. Automatic Licensing of Downstream Recipients.
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+
+  11. Patents.
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+  A "contributor" is a copyright holder who authorizes use under this
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+  A patent license is "discriminatory" if it does not include within
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+
+  Nothing in this License shall be construed as excluding or limiting
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+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
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+
+  14. Revised Versions of this License.
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+  The Free Software Foundation may publish revised and/or new versions of
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+  If the Program specifies that a proxy can decide which future
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+  Later license versions may give you additional or different
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+  17. Interpretation of Sections 15 and 16.
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+  If the disclaimer of warranty and limitation of liability provided
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+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
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+  To do so, attach the following notices to the program.  It is safest
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+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
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+    This program is free software: you can redistribute it and/or modify
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+
+    This program is distributed in the hope that it will be useful,
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+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.