Merge pull request #1464 from reyoung/feature/clean_mnist_v2

Combine Reader/Feeder together in trainer.train

demo/mnist/api_train_v2.py

 import paddle.v2 as paddle
 
-import mnist_util
-
-
-def train_reader():
-    train_file = './data/raw_data/train'
-    generator = mnist_util.read_from_mnist(train_file)
-    for item in generator:
-        yield item
-
 
 def main():
     paddle.init(use_gpu=False, trainer_count=1)
@@ -40,11 +31,13 @@ def main():
     trainer = paddle.trainer.SGD(update_equation=adam_optimizer)
 
     trainer.train(
-        train_data_reader=train_reader,
+        reader=paddle.reader.batched(
+            paddle.reader.shuffle(
+                paddle.dataset.mnist.train(), buf_size=8192),
+            batch_size=32),
         cost=cost,
         parameters=parameters,
         event_handler=event_handler,
-        batch_size=32,  # batch size should be refactor in Data reader
         reader_dict={images.name: 0,
                      label.name: 1})
 

python/CMakeLists.txt

@@ -4,7 +4,7 @@ set(OUTPUT_DIR
 file(GLOB TRAINER_PY_FILES . ./paddle/trainer/*.py)
 file(GLOB HELPERS_PY_FILES . ./paddle/trainer_config_helpers/*.py)
 file(GLOB UTILS_PY_FILES . ./paddle/utils/*.py)
-file(GLOB V2_PY_FILES . ./paddle/v2/*.py)
+file(GLOB_RECURSE V2_PY_FILES ./paddle/v2/ *.py)
 
 set(PY_FILES paddle/__init__.py
              ${TRAINER_PY_FILES}
@@ -24,7 +24,7 @@ add_custom_target(paddle_python ALL DEPENDS
     ${OUTPUT_DIR}/.timestamp)
 
 add_subdirectory(paddle/trainer_config_helpers/tests)
-add_subdirectory(paddle/reader/tests)
+add_subdirectory(paddle/v2/reader/tests)
 add_subdirectory(paddle/v2/tests)
 
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/dist/

python/paddle/reader/tests/CMakeLists.txt

-add_test(NAME reader_decorator_test
-  COMMAND ${PROJ_ROOT}/paddle/.set_python_path.sh -d ${PROJ_ROOT}/python/
-        ${PYTHON_EXECUTABLE} ${PROJ_ROOT}/python/paddle/reader/tests/decorator_test.py
-    WORKING_DIRECTORY ${PROJ_ROOT}/python/paddle)
-
-add_test(NAME reader_creator_test
-  COMMAND ${PROJ_ROOT}/paddle/.set_python_path.sh -d ${PROJ_ROOT}/python/
-        ${PYTHON_EXECUTABLE} ${PROJ_ROOT}/python/paddle/reader/tests/creator_test.py
-    WORKING_DIRECTORY ${PROJ_ROOT}/python/paddle)

python/paddle/v2/__init__.py

@@ -20,13 +20,16 @@ import event
 import data_type
 import topology
 import data_feeder
+from . import dataset
+from . import reader
 import attr
 import pooling
 import py_paddle.swig_paddle as api
 
 __all__ = [
     'optimizer', 'layer', 'activation', 'parameters', 'init', 'trainer',
-    'event', 'data_type', 'attr', 'pooling', 'data_feeder', 'topology'
+    'event', 'data_type', 'attr', 'pooling', 'data_feeder', 'dataset', 'reader',
+    'topology'
 ]
 
 

python/paddle/v2/dataset/__init__.py

+import mnist
+
+__all__ = ['mnist']

python/paddle/v2/dataset/mnist.py

 """
 MNIST dataset.
 """
-import numpy
 import paddle.v2.dataset.common
 import subprocess
-
+import numpy
+import platform
 __all__ = ['train', 'test']
 
 URL_PREFIX = 'http://yann.lecun.com/exdb/mnist/'
@@ -20,12 +20,19 @@ TRAIN_LABEL_MD5 = 'd53e105ee54ea40749a09fcbcd1e9432'
 
 def reader_creator(image_filename, label_filename, buffer_size):
     def reader():
+        if platform.system() == 'Darwin':
+            zcat_cmd = 'gzcat'
+        elif platform.system() == 'Linux':
+            zcat_cmd = 'zcat'
+        else:
+            raise NotImplementedError()
+
         # According to http://stackoverflow.com/a/38061619/724872, we
         # cannot use standard package gzip here.
-        m = subprocess.Popen(["zcat", image_filename], stdout=subprocess.PIPE)
+        m = subprocess.Popen([zcat_cmd, image_filename], stdout=subprocess.PIPE)
         m.stdout.read(16)  # skip some magic bytes
 
-        l = subprocess.Popen(["zcat", label_filename], stdout=subprocess.PIPE)
+        l = subprocess.Popen([zcat_cmd, label_filename], stdout=subprocess.PIPE)
         l.stdout.read(8)  # skip some magic bytes
 
         while True:

python/paddle/reader/decorator.py → python/paddle/v2/reader/decorator.py

@@ -14,7 +14,7 @@
 
 __all__ = [
     'map_readers', 'buffered', 'compose', 'chain', 'shuffle',
-    'ComposeNotAligned'
+    'ComposeNotAligned', 'batched'
 ]
 
 from Queue import Queue
@@ -191,3 +191,25 @@ def buffered(reader, size):
             e = q.get()
 
     return data_reader
+
+
+def batched(reader, batch_size):
+    """
+    Create a batched reader.
+    :param reader: the data reader to read from.
+    :param batch_size: batch_size
+    :return: the batched reader.
+    """
+
+    def batched_reader():
+        r = reader()
+        batch = []
+        for instance in r:
+            batch.append(instance)
+            if len(batch) == batch_size:
+                yield batch
+                batch = []
+        if batch:
+            yield batch
+
+    return batched_reader

python/paddle/v2/reader/tests/CMakeLists.txt

+add_test(NAME reader_tests
+  COMMAND bash ${PROJ_ROOT}/python/paddle/v2/reader/tests/run_tests.sh
+  ${PYTHON_EXECUTABLE})

python/paddle/reader/tests/creator_test.py → python/paddle/v2/reader/tests/creator_test.py

@@ -11,17 +11,19 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import os
 import unittest
-import paddle.reader.creator
+
 import numpy as np
-import os
+
+import paddle.v2.reader.creator
 
 
 class TestNumpyArray(unittest.TestCase):
     def test_numpy_array(self):
         l = [[1, 2, 3], [4, 5, 6]]
         x = np.array(l, np.int32)
-        reader = paddle.reader.creator.np_array(x)
+        reader = paddle.v2.reader.creator.np_array(x)
         for idx, e in enumerate(reader()):
             self.assertItemsEqual(e, l[idx])
 
@@ -29,7 +31,7 @@ class TestNumpyArray(unittest.TestCase):
 class TestTextFile(unittest.TestCase):
     def test_text_file(self):
         path = os.path.join(os.path.dirname(__file__), "test_data_creator.txt")
-        reader = paddle.reader.creator.text_file(path)
+        reader = paddle.v2.reader.creator.text_file(path)
         for idx, e in enumerate(reader()):
             self.assertEqual(e, str(idx * 2) + " " + str(idx * 2 + 1))
 

python/paddle/reader/tests/decorator_test.py → python/paddle/v2/reader/tests/decorator_test.py

@@ -11,9 +11,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import unittest
-import paddle.reader
 import time
+import unittest
+
+import paddle.v2.reader
 
 
 def reader_creator_10(dur):
@@ -37,7 +38,7 @@ class TestMap(unittest.TestCase):
             yield "h"
             yield "i"
 
-        r = paddle.reader.map_readers(tokenize, read)
+        r = paddle.v2.reader.map_readers(tokenize, read)
         for i, e in enumerate(r()):
             self.assertEqual(e, i)
 
@@ -45,7 +46,7 @@ class TestMap(unittest.TestCase):
 class TestBuffered(unittest.TestCase):
     def test_read(self):
         for size in range(20):
-            b = paddle.reader.buffered(reader_creator_10(0), size)
+            b = paddle.v2.reader.buffered(reader_creator_10(0), size)
             c = 0
             for i in b():
                 self.assertEqual(i, c)
@@ -54,7 +55,7 @@ class TestBuffered(unittest.TestCase):
 
     def test_buffering(self):
         # read have 30ms delay.
-        b = paddle.reader.buffered(reader_creator_10(0.03), 10)
+        b = paddle.v2.reader.buffered(reader_creator_10(0.03), 10)
         last_time = time.time()
         for idx, i in enumerate(b()):
             elapsed_time = time.time() - last_time
@@ -68,17 +69,17 @@ class TestBuffered(unittest.TestCase):
 
 class TestCompose(unittest.TestCase):
     def test_compse(self):
-        reader = paddle.reader.compose(
+        reader = paddle.v2.reader.compose(
             reader_creator_10(0), reader_creator_10(0))
         for idx, e in enumerate(reader()):
             self.assertEqual(e, (idx, idx))
 
     def test_compose_not_aligned(self):
         total = 0
-        reader = paddle.reader.compose(
-            paddle.reader.chain(reader_creator_10(0), reader_creator_10(0)),
+        reader = paddle.v2.reader.compose(
+            paddle.v2.reader.chain(reader_creator_10(0), reader_creator_10(0)),
             reader_creator_10(0))
-        with self.assertRaises(paddle.reader.ComposeNotAligned):
+        with self.assertRaises(paddle.v2.reader.ComposeNotAligned):
             for e in reader():
                 total += 1
         # expecting 10, not 20
@@ -86,8 +87,8 @@ class TestCompose(unittest.TestCase):
 
     def test_compose_not_aligned_no_check(self):
         total = 0
-        reader = paddle.reader.compose(
-            paddle.reader.chain(reader_creator_10(0), reader_creator_10(0)),
+        reader = paddle.v2.reader.compose(
+            paddle.v2.reader.chain(reader_creator_10(0), reader_creator_10(0)),
             reader_creator_10(0),
             check_alignment=False)
         for e in reader():
@@ -98,7 +99,7 @@ class TestCompose(unittest.TestCase):
 
 class TestChain(unittest.TestCase):
     def test_chain(self):
-        c = paddle.reader.chain(reader_creator_10(0), reader_creator_10(0))
+        c = paddle.v2.reader.chain(reader_creator_10(0), reader_creator_10(0))
         idx = 0
         for e in c():
             self.assertEqual(e, idx % 10)
@@ -111,7 +112,7 @@ class TestShuffle(unittest.TestCase):
         case = [(0, True), (1, True), (10, False), (100, False)]
         a = reader_creator_10(0)
         for size, checkEq in case:
-            s = paddle.reader.shuffle(a, size)
+            s = paddle.v2.reader.shuffle(a, size)
             total = 0
             for idx, e in enumerate(s()):
                 if checkEq:

python/paddle/v2/reader/tests/run_tests.sh

+#!/bin/bash
+# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+pushd `dirname $0` > /dev/null
+SCRIPTPATH=$PWD
+popd > /dev/null
+
+cd $SCRIPTPATH
+$1 -m pip install ../../../../../paddle/dist/*.whl
+
+test_list="creator_test.py decorator_test.py"
+
+export PYTHONPATH=$PWD/../../../../../python/
+
+for fn in $test_list
+do
+  echo "test $fn"
+  $1 $fn
+  if [ $? -ne 0 ]; then
+    exit 1
+  fi
+done

python/paddle/v2/trainer.py

@@ -27,19 +27,13 @@ class ITrainer(object):
     The interface of Trainer. The only exposed method is `train`.
     """
 
-    def train(self,
-              train_data_reader,
-              cost,
-              parameters,
-              test_data_reader=None,
-              event_handler=None):
+    def train(self, reader, topology, parameters, event_handler=None):
         """
         train method.
 
-        :param train_data_reader:
-        :param cost:
+        :param reader:
+        :param topology:
         :param parameters:
-        :param test_data_reader:
         :param event_handler:
         :return:
         """
@@ -61,26 +55,22 @@ class SGD(ITrainer):
         self.__optimizer__ = update_equation
 
     def train(self,
-              train_data_reader,
+              reader,
               cost,
               parameters,
               num_passes=1,
-              test_data_reader=None,
               event_handler=None,
-              batch_size=32,
               reader_dict=None):
         """
         Training method. Will train num_passes of input data.
 
-        :param train_data_reader:
-        :param cost: cost layers, to be optimized.
+        :param reader:
+        :param topology: Network Topology, use one or more Layers to represent it.
         :param parameters: The parameter pools.
         :param num_passes: The total train passes.
-        :param test_data_reader:
         :param event_handler: Event handler. A method will be invoked when event
                               occurred.
         :type event_handler: (BaseEvent) => None
-        :param batch_size: Not important, will be removed after data refactor.
         :return:
         """
         if event_handler is None:
@@ -112,9 +102,9 @@ class SGD(ITrainer):
             event_handler(v2_event.BeginPass(pass_id))
             pass_evaluator.start()
             updater.startPass()
-            for batch_id, data_batch in enumerate(
-                    __data_reader_to_batch__(train_data_reader, batch_size,
-                                             topology)):
+            for batch_id, data_batch in enumerate(reader()):
+                pass_type = updater.startBatch(len(data_batch))
+                gm.forwardBackward(feeder(data_batch), out_args, pass_type)
                 batch_evaluator.start()
                 event_handler(
                     v2_event.BeginIteration(
@@ -144,56 +134,19 @@ class SGD(ITrainer):
         gm.finish()
 
 
-def __data_reader_to_batch__(reader, batch_size, topology):
-    """
-    This function is not important, and will be removed when data refactored.
-    """
-
-    def input_reorder(func):
-        for item in func():
-            retv = []
-            for __layer_name__ in topology.proto().input_layer_names:
-                retv.append(item[__layer_name__])
-            yield retv
-
-    return __generator_to_batch__(input_reorder(reader), batch_size=batch_size)
-
-
-def __generator_to_batch__(generator, batch_size):
-    """
-    This function is not important, and will be removed when data refactored.
-    """
-    ret_val = list()
-    for each_item in generator:
-        ret_val.append(each_item)
-        if len(ret_val) == batch_size:
-            yield ret_val
-            ret_val = list()
-    if len(ret_val) != 0:
-        yield ret_val
-
-
-def __check_train_args__(train_data_reader, topology, parameters,
-                         test_data_reader, event_handler, **kwargs):
+def __check_train_args__(reader, topology, parameters, event_handler, **kwargs):
     """
     Check train function's argument types
     """
-    if not callable(train_data_reader) or not isinstance(train_data_reader(),
-                                                         collections.Iterator):
-        raise ValueError('train_data_reader should be a function, '
-                         'which can return a iterator')
-
-    if test_data_reader is not None:
-        if not callable(test_data_reader) or not isinstance(
-                test_data_reader(), collections.Iterator):
-            raise ValueError('test_data_reader should be a function, which can '
-                             'return a iterator')
+    if not callable(reader) or not isinstance(reader(), collections.Iterator):
+        raise TypeError('train_data_reader should be a function, '
+                        'which can return a iterator')
 
     if not isinstance(topology, Topology):
-        raise ValueError('topology should be a model config')
+        raise TypeError('topology should be a model config')
 
     if not isinstance(parameters, v2_parameters.Parameters):
-        raise ValueError('parameters should be a parameter pool')
+        raise TypeError('parameters should be a parameter pool')
 
     if not callable(event_handler):
-        raise ValueError('event handler should be a function')
+        raise TypeError('event handler should be a function')

python/setup.py.in

@@ -5,7 +5,9 @@ packages=['paddle',
           'paddle.trainer',
           'paddle.trainer_config_helpers',
           'paddle.utils',
-          'paddle.v2']
+          'paddle.v2',
+          'paddle.v2.dataset',
+          'paddle.v2.reader']
 
 setup(name='paddle',
       version='${PADDLE_VERSION}',