diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d902e6da25fd9bb4b0f2729a9cb7b90834f60307..2e6aebbd9a294bd3cc8c253b4133f8669b2dd400 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,7 +24,7 @@
         files: \.md$
     -   id: remove-tabs
         files: \.md$
--   repo: git://github.com/reyoung/pre-commit-hooks-jinja-compile.git
+-   repo: https://github.com/reyoung/pre-commit-hooks-jinja-compile.git
     sha: 85ad800cbc9c60a64230d60971aa9576fd57e508
     hooks:
     -   id: convert-jinja2-into-html
diff --git a/recognize_digits/data/get_mnist_data.sh b/recognize_digits/data/get_mnist_data.sh
deleted file mode 100755
index 8d5cf179a940be06288d283e8a783b28d038acad..0000000000000000000000000000000000000000
--- a/recognize_digits/data/get_mnist_data.sh
+++ /dev/null
@@ -1,35 +0,0 @@
-#!/usr/bin/env sh
-# 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.
-# This scripts downloads the mnist data and unzips it.
-set -e
-DIR="$( cd "$(dirname "$0")" ; pwd -P )"
-rm -rf "$DIR/raw_data"
-mkdir "$DIR/raw_data"
-cd "$DIR/raw_data"
-
-echo "Downloading..."
-
-for fname in train-images-idx3-ubyte train-labels-idx1-ubyte t10k-images-idx3-ubyte t10k-labels-idx1-ubyte
-do
-    if [ ! -e $fname ]; then
-        wget --no-check-certificate http://yann.lecun.com/exdb/mnist/${fname}.gz
-        gunzip ${fname}.gz
-    fi
-done
-
-cd $DIR
-rm -f *.list
-echo "./data/raw_data/train" > "$DIR/train.list"
-echo "./data/raw_data/t10k" > "$DIR/test.list"
diff --git a/recognize_digits/evaluate.py b/recognize_digits/evaluate.py
deleted file mode 100755
index b91467e242e83fe47b910c44122acc26209dcaec..0000000000000000000000000000000000000000
--- a/recognize_digits/evaluate.py
+++ /dev/null
@@ -1,35 +0,0 @@
-#!/usr/bin/python
-# 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.
-import sys
-import re
-import math
-
-
-def get_best_pass(filename):
-    with open(filename, 'r') as f:
-        text = f.read()
-        pattern = re.compile(
-            'Test.*? cost=([0-9]+\.[0-9]+).*?classification_error_evaluator=([0-9]+\.[0-9]+).*?pass-([0-9]+)',
-            re.S)
-        results = re.findall(pattern, text)
-        sorted_results = sorted(results, key=lambda result: float(result[0]))
-        return sorted_results[0]
-
-
-filename = sys.argv[1]
-log = get_best_pass(filename)
-classification_accuracy = (1 - float(log[1])) * 100
-print 'Best pass is %s, testing Avgcost is %s' % (log[2], log[0])
-print 'The classification accuracy is %.2f%%' % classification_accuracy
diff --git a/recognize_digits/load_data.py b/recognize_digits/load_data.py
deleted file mode 100644
index a3055a591ee897afccc1e56c4f8abde5b274e93f..0000000000000000000000000000000000000000
--- a/recognize_digits/load_data.py
+++ /dev/null
@@ -1,47 +0,0 @@
-# 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.
-import numpy as np
-import matplotlib.pyplot as plt
-import random
-import struct
-
-
-def read_data(path, filename):
-    with open(path + filename + "-images-idx3-ubyte",
-              "rb") as f:  # open picture file
-        magic, n, rows, cols = struct.unpack(">IIII", f.read(16))
-        images = np.fromfile(
-            f, 'ubyte',
-            count=n * rows * cols).reshape(n, rows, cols).astype('float32')
-
-    with open(path + filename + "-labels-idx1-ubyte",
-              "rb") as l:  # open label file
-        magic, n = struct.unpack(">II", l.read(8))
-        labels = np.fromfile(l, 'ubyte', count=n).astype("int")
-
-    return images, labels
-
-
-if __name__ == "__main__":
-    train_images, train_labels = read_data("./data/raw_data/", "train")
-    test_images, test_labels = read_data("./data/raw_data/", "t10k")
-    label_list = []
-    for i in range(10):
-        index = random.randint(0, train_images.shape[0] - 1)
-        label_list.append(train_labels[index])
-        plt.subplot(1, 10, i + 1)
-        plt.imshow(train_images[index], cmap="Greys_r")
-        plt.axis('off')
-    print('label: %s' % (label_list, ))
-    plt.show()
diff --git a/recognize_digits/mnist_model.py b/recognize_digits/mnist_model.py
deleted file mode 100644
index 4bece1bbe5988c0acc6341d3fb1a6b81c3dcbed7..0000000000000000000000000000000000000000
--- a/recognize_digits/mnist_model.py
+++ /dev/null
@@ -1,95 +0,0 @@
-# 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.
-
-from paddle.trainer_config_helpers import *
-
-is_predict = get_config_arg("is_predict", bool, False)
-
-####################Data Configuration ##################
-
-if not is_predict:
-    data_dir = './data/'
-    define_py_data_sources2(
-        train_list=data_dir + 'train.list',
-        test_list=data_dir + 'test.list',
-        module='mnist_provider',
-        obj='process')
-
-######################Algorithm Configuration #############
-settings(
-    batch_size=128,
-    learning_rate=0.1 / 128.0,
-    learning_method=MomentumOptimizer(0.9),
-    regularization=L2Regularization(0.0005 * 128))
-
-#######################Network Configuration #############
-
-data_size = 1 * 28 * 28
-label_size = 10
-img = data_layer(name='pixel', size=data_size)
-
-
-def softmax_regression(img):
-    predict = fc_layer(input=img, size=10, act=SoftmaxActivation())
-    return predict
-
-
-def multilayer_perceptron(img):
-    # The first fully-connected layer
-    hidden1 = fc_layer(input=img, size=128, act=ReluActivation())
-    # The second fully-connected layer and the according activation function
-    hidden2 = fc_layer(input=hidden1, size=64, act=ReluActivation())
-    # The thrid fully-connected layer, note that the hidden size should be 10,
-    # which is the number of unique digits
-    predict = fc_layer(input=hidden2, size=10, act=SoftmaxActivation())
-    return predict
-
-
-def convolutional_neural_network(img):
-    # first conv layer
-    conv_pool_1 = simple_img_conv_pool(
-        input=img,
-        filter_size=5,
-        num_filters=20,
-        num_channel=1,
-        pool_size=2,
-        pool_stride=2,
-        act=TanhActivation())
-    # second conv layer
-    conv_pool_2 = simple_img_conv_pool(
-        input=conv_pool_1,
-        filter_size=5,
-        num_filters=50,
-        num_channel=20,
-        pool_size=2,
-        pool_stride=2,
-        act=TanhActivation())
-    # The first fully-connected layer
-    fc1 = fc_layer(input=conv_pool_2, size=128, act=TanhActivation())
-    # The softmax layer, note that the hidden size should be 10,
-    # which is the number of unique digits
-    predict = fc_layer(input=fc1, size=10, act=SoftmaxActivation())
-    return predict
-
-
-predict = softmax_regression(img)
-#predict = multilayer_perceptron(img)
-#predict = convolutional_neural_network(img)
-
-if not is_predict:
-    lbl = data_layer(name="label", size=label_size)
-    inputs(img, lbl)
-    outputs(classification_cost(input=predict, label=lbl))
-else:
-    outputs(predict)
diff --git a/recognize_digits/mnist_provider.py b/recognize_digits/mnist_provider.py
deleted file mode 100644
index b6f1d9662ed46aa18030543246b096fdc2e892cc..0000000000000000000000000000000000000000
--- a/recognize_digits/mnist_provider.py
+++ /dev/null
@@ -1,37 +0,0 @@
-# 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.
-
-from paddle.trainer.PyDataProvider2 import *
-import numpy as np
-import struct
-
-
-# Define a py data provider
-@provider(
-    input_types={'pixel': dense_vector(28 * 28),
-                 'label': integer_value(10)})
-def process(settings, filename):  # settings is not used currently.
-    with open(filename + "-images-idx3-ubyte", "rb") as f:  # open picture file
-        magic, n, rows, cols = struct.unpack(">IIII", f.read(16))
-        images = np.fromfile(
-            f, 'ubyte',
-            count=n * rows * cols).reshape(n, rows, cols).astype('float32')
-        images = images / 255.0 * 2.0 - 1.0  # normalized to [-1,1]
-
-    with open(filename + "-labels-idx1-ubyte", "rb") as l:  # open label file
-        magic, n = struct.unpack(">II", l.read(8))
-        labels = np.fromfile(l, 'ubyte', count=n).astype("int")
-
-    for i in xrange(n):
-        yield {"pixel": images[i, :], 'label': labels[i]}
diff --git a/recognize_digits/plot_cost.py b/recognize_digits/plot_cost.py
deleted file mode 100644
index 1f79e835f6ccb282102a97699ae9c08fa5fd3aae..0000000000000000000000000000000000000000
--- a/recognize_digits/plot_cost.py
+++ /dev/null
@@ -1,54 +0,0 @@
-# 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.
-
-import matplotlib.pyplot as plt
-import re
-import sys
-
-
-def plot_log(filename):
-    with open(filename, 'r') as f:
-        text = f.read()
-        pattern = re.compile(
-            'AvgCost=([0-9]+\.[0-9]+).*?Test.*? cost=([0-9]+\.[0-9]+).*?pass-([0-9]+)',
-            re.S)
-        results = re.findall(pattern, text)
-        train_cost, test_cost, pass_ = zip(*results)
-        train_cost_float = map(float, train_cost)
-        test_cost_float = map(float, test_cost)
-        pass_int = map(int, pass_)
-        plt.plot(pass_int, train_cost_float, 'red', label='Train')
-        plt.plot(pass_int, test_cost_float, 'g--', label='Test')
-        plt.ylabel('AvgCost')
-        plt.xlabel('Epoch')
-
-        # Now add the legend with some customizations.
-        legend = plt.legend(loc='upper right', shadow=False)
-
-        # The frame is matplotlib.patches.Rectangle instance surrounding the legend.
-        frame = legend.get_frame()
-        frame.set_facecolor('0.90')
-
-        # Set the fontsize
-        for label in legend.get_texts():
-            label.set_fontsize('large')
-
-        for label in legend.get_lines():
-            label.set_linewidth(1.5)  # the legend line width
-
-        plt.show()
-
-
-if __name__ == '__main__':
-    plot_log(sys.argv[1])
diff --git a/recognize_digits/predict.py b/recognize_digits/predict.py
deleted file mode 100644
index 0a6c87bf1a1b982141fd9924f33532ba77e37974..0000000000000000000000000000000000000000
--- a/recognize_digits/predict.py
+++ /dev/null
@@ -1,78 +0,0 @@
-# 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.
-"""Usage: predict.py -c CONF -d DATA -m MODEL
-
-Arguments:
-    CONF        train conf
-    DATA        MNIST Data
-    MODEL       Model
-
-Options:
-    -h      --help
-    -c      conf
-    -d      data
-    -m      model
-"""
-
-import os
-import sys
-from docopt import docopt
-import numpy as np
-
-from py_paddle import swig_paddle, DataProviderConverter
-from paddle.trainer.PyDataProvider2 import dense_vector
-from paddle.trainer.config_parser import parse_config
-
-from load_data import read_data
-
-
-class Prediction():
-    def __init__(self, train_conf, data_dir, model_dir):
-
-        conf = parse_config(train_conf, 'is_predict=1')
-        self.network = swig_paddle.GradientMachine.createFromConfigProto(
-            conf.model_config)
-        self.network.loadParameters(model_dir)
-
-        self.images, self.labels = read_data(data_dir, "t10k")
-        self.images = self.images / 255.0 * 2.0 - 1.0  # normalized to [-1,1]
-
-        slots = [dense_vector(28 * 28)]
-        self.converter = DataProviderConverter(slots)
-
-    def predict(self, index):
-        input = self.converter([[self.images[index].flatten().tolist()]])
-        output = self.network.forwardTest(input)
-        prob = output[0]["value"]
-        predict = np.argsort(-prob)
-        print "Predicted probability of each digit:"
-        print prob
-        print "Predict Number: %d" % predict[0][0]
-        print "Actual Number: %d" % self.labels[index]
-
-
-def main():
-    arguments = docopt(__doc__)
-    train_conf = arguments['CONF']
-    data_dir = arguments['DATA']
-    model_dir = arguments['MODEL']
-    swig_paddle.initPaddle("--use_gpu=0")
-    predictor = Prediction(train_conf, data_dir, model_dir)
-    while True:
-        index = int(raw_input("Input image_id [0~9999]: "))
-        predictor.predict(index)
-
-
-if __name__ == '__main__':
-    main()
diff --git a/recognize_digits/train.sh b/recognize_digits/train.sh
deleted file mode 100755
index dfe59b746e10c41b24e9a431cfa092e3dad31b4f..0000000000000000000000000000000000000000
--- a/recognize_digits/train.sh
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/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.
-set -e
-
-config=mnist_model.py
-output=./softmax_mnist_model
-log=softmax_train.log
-
-
-
-paddle train \
---config=$config \
---dot_period=10 \
---log_period=100 \
---test_all_data_in_one_period=1 \
---use_gpu=0 \
---trainer_count=1 \
---num_passes=100 \
---save_dir=$output \
-2>&1 | tee $log
-
-python -m paddle.utils.plotcurve -i $log > plot.png