Paddle/demo/introduction/dataprovider.py

# 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 random


# define data types of input: 2 real numbers
@provider(
    input_types={'x': dense_vector(1),
                 'y': dense_vector(1)}, use_seq=False)
def process(settings, input_file):
    for i in xrange(2000):
        x = random.random()
        yield {'x': [x], 'y': [2 * x + 0.3]}