test_while_op.py

# Copyright (c) 2018 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 __future__ import print_function

import unittest
import paddle
import paddle.fluid.layers as layers
from paddle.fluid.executor import Executor
import paddle.fluid.core as core
import paddle.fluid as fluid
from paddle.fluid.backward import append_backward
import numpy
from paddle.fluid import compiler, Program, program_guard

paddle.enable_static()


class TestWhileOp(unittest.TestCase):

    def simple_net(self):
        d0 = layers.data("d0",
                         shape=[10],
                         append_batch_size=False,
                         dtype='float32')
        d1 = layers.data("d1",
                         shape=[10],
                         append_batch_size=False,
                         dtype='float32')
        d2 = layers.data("d2",
                         shape=[10],
                         append_batch_size=False,
                         dtype='float32')
        i = layers.zeros(shape=[1], dtype='int64')
        i.stop_gradient = True
        init = layers.zeros(shape=[10], dtype='float32')
        mem_array = layers.array_write(x=init, i=i)
        data_array = layers.array_write(x=d0, i=i)
        i = layers.increment(i)
        layers.array_write(d1, i, array=data_array)
        i = layers.increment(i)
        layers.array_write(d2, i, array=data_array)
        i = layers.zeros(shape=[1], dtype='int64')
        i.stop_gradient = True
        array_len = layers.fill_constant(shape=[1], dtype='int64', value=1)
        array_len.stop_gradient = True
        cond = layers.less_than(x=i, y=array_len)
        j = layers.fill_constant(shape=[1], dtype='int64', value=1)
        j.stop_gradient = True
        array_len2 = layers.fill_constant(shape=[1], dtype='int64', value=3)
        array_len2.stop_gradient = True
        cond2 = layers.less_than(x=j, y=array_len2)
        while_op = layers.While(cond=cond)
        while_op2 = layers.While(cond=cond2)
        with while_op.block():
            d = layers.array_read(array=data_array, i=i)
            prev = layers.array_read(array=mem_array, i=i)
            result = layers.sums(input=[d, prev])

            i = layers.increment(x=i, in_place=True)
            layers.array_write(result, i=i, array=mem_array)
            layers.less_than(x=i, y=array_len, cond=cond)

            with while_op2.block():
                d2 = layers.array_read(array=data_array, i=j)
                prev2 = layers.array_read(array=mem_array, i=j)
                result2 = layers.sums(input=[d2, prev2])

                j = layers.increment(x=j, in_place=True)
                layers.array_write(result2, i=j, array=mem_array)
                layers.less_than(x=j, y=array_len2, cond=cond2)
        sum_result = layers.array_read(array=mem_array, i=j)
        loss = layers.mean(sum_result)
        return loss, sum_result

    def test_simple_net(self):
        main_program = fluid.Program()
        startup_program = fluid.Program()
        with fluid.program_guard(main_program, startup_program):
            loss, sum_result = self.simple_net()

            append_backward(loss)

            cpu = core.CPUPlace()
            exe = Executor(cpu)
            d = []

            for i in range(3):
                d.append(numpy.random.random(size=[10]).astype('float32'))

            outs = exe.run(feed={
                'd0': d[0],
                'd1': d[1],
                'd2': d[2]
            },
                           fetch_list=[sum_result])
            self.assertAlmostEqual(numpy.sum(d), numpy.sum(outs[0]), delta=0.01)

    def test_simple_net_forward(self):
        main_program = fluid.Program()
        startup_program = fluid.Program()
        with fluid.program_guard(main_program, startup_program):
            self.simple_net()
            binary = fluid.compiler.CompiledProgram(main_program)

            cpu = core.CPUPlace()
            exe = Executor(cpu)
            d = []

            for i in range(3):
                d.append(numpy.random.random(size=[10]).astype('float32'))

            for _ in range(2):
                exe.run(binary, feed={'d0': d[0], 'd1': d[1], 'd2': d[2]})

    def test_exceptions(self):
        i = layers.zeros(shape=[2], dtype='int64')
        array_len = layers.fill_constant(shape=[2], dtype='int64', value=1)
        cond = layers.less_than(x=i, y=array_len)
        with self.assertRaises(TypeError):
            layers.While(cond=cond)
        cond = layers.cast(cond, dtype='float64')
        with self.assertRaises(TypeError):
            layers.While(cond=cond)


class BadInputTest(unittest.TestCase):

    def test_error(self):
        with fluid.program_guard(fluid.Program()):

            def test_bad_x():
                x = [1, 2, 3]
                fluid.layers.increment(x)

            self.assertRaises(TypeError, test_bad_x)


class TestIgnoreVarNameInWhile(unittest.TestCase):

    def test_ignore_var(self):

        def cond(i, ten, temp, y):
            return i < ten

        def body_func(i, ten, batch_info, origin_seq):
            print(batch_info)
            batch_info = fluid.contrib.layers.shuffle_batch(batch_info)
            print(batch_info)
            i = i + 1
            return [i, ten, batch_info, origin_seq]

        x = fluid.layers.data(name='x', shape=[-1, 1, 4])
        y = fluid.layers.data(name='y', shape=[-1, 1, 1])
        temp = layers.concat(input=[x, y], axis=-1)
        i = layers.fill_constant(shape=[1], value=0, dtype='int32')
        num = layers.fill_constant(shape=[1], value=5, dtype='int32')

        i, ten, shuffle_temp, y = layers.while_loop(cond, body_func,
                                                    [i, num, temp, y])

        output = shuffle_temp

        exe = fluid.Executor(fluid.CPUPlace())
        exe.run(fluid.default_startup_program())

        input_x = numpy.array([[1, 2, 3, 4], [4, 5, 6, 7], [7, 8, 9, 10]])
        input_x = input_x.reshape(3, 1, 4)
        input_y = numpy.array([[10], [12], [33]])
        input_y = input_y.reshape(3, 1, 1)

        res, = exe.run(fluid.default_main_program(),
                       feed={
                           'x': input_x,
                           'y': input_y
                       },
                       fetch_list=[output])

        self.assertListEqual(list(res.shape), [3, 1, 5])


if __name__ == '__main__':
    unittest.main()