#   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 sys

import unittest
import paddle
import paddle.fluid as fluid
import paddle.fluid.core as core
from paddle.fluid.dygraph.nn import Embedding
import paddle.fluid.framework as framework
from paddle.fluid.optimizer import Adam
from paddle.fluid.dygraph.base import to_variable
from test_imperative_base import new_program_scope
from paddle.fluid.executor import global_scope
import numpy as np
import six
import pickle
import os
import errno


class SimpleLSTMRNN(fluid.Layer):
    def __init__(self,
                 name_scope,
                 hidden_size,
                 num_steps,
                 num_layers=2,
                 init_scale=0.1,
                 dropout=None):
        super(SimpleLSTMRNN, self).__init__()
        self._hidden_size = hidden_size
        self._num_layers = num_layers
        self._init_scale = init_scale
        self._dropout = dropout
        self._input = None
        self._num_steps = num_steps
        self.cell_array = []
        self.hidden_array = []

        self.weight_1_arr = []
        self.weight_2_arr = []
        self.bias_arr = []
        self.mask_array = []

        for i in range(self._num_layers):
            weight_1 = self.create_parameter(
                attr=fluid.ParamAttr(
                    initializer=fluid.initializer.UniformInitializer(
                        low=-self._init_scale, high=self._init_scale)),
                shape=[self._hidden_size * 2, self._hidden_size * 4],
                dtype="float32",
                default_initializer=fluid.initializer.UniformInitializer(
                    low=-self._init_scale, high=self._init_scale))
            self.weight_1_arr.append(self.add_parameter('w_%d' % i, weight_1))
            bias_1 = self.create_parameter(
                attr=fluid.ParamAttr(
                    initializer=fluid.initializer.UniformInitializer(
                        low=-self._init_scale, high=self._init_scale)),
                shape=[self._hidden_size * 4],
                dtype="float32",
                default_initializer=fluid.initializer.Constant(0.0))
            self.bias_arr.append(self.add_parameter('b_%d' % i, bias_1))

    def forward(self, input_embedding, init_hidden=None, init_cell=None):
        self.cell_array = []
        self.hidden_array = []

        for i in range(self._num_layers):
            pre_hidden = fluid.layers.slice(
                init_hidden, axes=[0], starts=[i], ends=[i + 1])
            pre_cell = fluid.layers.slice(
                init_cell, axes=[0], starts=[i], ends=[i + 1])
            pre_hidden = fluid.layers.reshape(
                pre_hidden, shape=[-1, self._hidden_size])
            pre_cell = fluid.layers.reshape(
                pre_cell, shape=[-1, self._hidden_size])
            self.hidden_array.append(pre_hidden)
            self.cell_array.append(pre_cell)

        res = []
        for index in range(self._num_steps):
            self._input = fluid.layers.slice(
                input_embedding, axes=[1], starts=[index], ends=[index + 1])
            self._input = fluid.layers.reshape(
                self._input, shape=[-1, self._hidden_size])
            for k in range(self._num_layers):
                pre_hidden = self.hidden_array[k]
                pre_cell = self.cell_array[k]
                weight_1 = self.weight_1_arr[k]
                bias = self.bias_arr[k]

                nn = fluid.layers.concat([self._input, pre_hidden], 1)
                gate_input = fluid.layers.matmul(x=nn, y=weight_1)

                gate_input = fluid.layers.elementwise_add(gate_input, bias)
                i, j, f, o = fluid.layers.split(
                    gate_input, num_or_sections=4, dim=-1)
                c = pre_cell * fluid.layers.sigmoid(f) + fluid.layers.sigmoid(
                    i) * fluid.layers.tanh(j)
                m = fluid.layers.tanh(c) * fluid.layers.sigmoid(o)
                self.hidden_array[k] = m
                self.cell_array[k] = c
                self._input = m

                if self._dropout is not None and self._dropout > 0.0:
                    self._input = fluid.layers.dropout(
                        self._input,
                        dropout_prob=self._dropout,
                        dropout_implementation='upscale_in_train')
            res.append(
                fluid.layers.reshape(
                    self._input, shape=[1, -1, self._hidden_size]))
        real_res = fluid.layers.concat(res, 0)
        real_res = fluid.layers.transpose(x=real_res, perm=[1, 0, 2])
        last_hidden = fluid.layers.concat(self.hidden_array, 1)
        last_hidden = fluid.layers.reshape(
            last_hidden, shape=[-1, self._num_layers, self._hidden_size])
        last_hidden = fluid.layers.transpose(x=last_hidden, perm=[1, 0, 2])
        last_cell = fluid.layers.concat(self.cell_array, 1)
        last_cell = fluid.layers.reshape(
            last_cell, shape=[-1, self._num_layers, self._hidden_size])
        last_cell = fluid.layers.transpose(x=last_cell, perm=[1, 0, 2])
        return real_res, last_hidden, last_cell


class PtbModel(fluid.Layer):
    def __init__(self,
                 name_scope,
                 hidden_size,
                 vocab_size,
                 num_layers=2,
                 num_steps=20,
                 init_scale=0.1,
                 dropout=None):
        super(PtbModel, self).__init__()
        self.hidden_size = hidden_size
        self.vocab_size = vocab_size
        self.init_scale = init_scale
        self.num_layers = num_layers
        self.num_steps = num_steps
        self.dropout = dropout
        self.simple_lstm_rnn = SimpleLSTMRNN(
            self.full_name(),
            hidden_size,
            num_steps,
            num_layers=num_layers,
            init_scale=init_scale,
            dropout=dropout)
        self.embedding = Embedding(
            size=[vocab_size, hidden_size],
            dtype='float32',
            is_sparse=False,
            param_attr=fluid.ParamAttr(
                name='embedding_para',
                initializer=fluid.initializer.UniformInitializer(
                    low=-init_scale, high=init_scale)))
        self.softmax_weight = self.create_parameter(
            attr=fluid.ParamAttr(),
            shape=[self.hidden_size, self.vocab_size],
            dtype="float32",
            default_initializer=fluid.initializer.UniformInitializer(
                low=-self.init_scale, high=self.init_scale))
        self.softmax_bias = self.create_parameter(
            attr=fluid.ParamAttr(),
            shape=[self.vocab_size],
            dtype="float32",
            default_initializer=fluid.initializer.UniformInitializer(
                low=-self.init_scale, high=self.init_scale))

    def forward(self, input, label, init_hidden, init_cell):
        init_h = fluid.layers.reshape(
            init_hidden, shape=[self.num_layers, -1, self.hidden_size])

        init_c = fluid.layers.reshape(
            init_cell, shape=[self.num_layers, -1, self.hidden_size])

        x_emb = self.embedding(input)
        x_emb = fluid.layers.reshape(
            x_emb, shape=[-1, self.num_steps, self.hidden_size])
        if self.dropout is not None and self.dropout > 0.0:
            x_emb = fluid.layers.dropout(
                x_emb,
                dropout_prob=self.drop_out,
                dropout_implementation='upscale_in_train')
        rnn_out, last_hidden, last_cell = self.simple_lstm_rnn(x_emb, init_h,
                                                               init_c)

        rnn_out = fluid.layers.reshape(
            rnn_out, shape=[-1, self.num_steps, self.hidden_size])
        projection = fluid.layers.matmul(rnn_out, self.softmax_weight)
        projection = fluid.layers.elementwise_add(projection, self.softmax_bias)
        projection = fluid.layers.reshape(
            projection, shape=[-1, self.vocab_size])
        loss = fluid.layers.softmax_with_cross_entropy(
            logits=projection, label=label, soft_label=False)
        loss = fluid.layers.reshape(loss, shape=[-1, self.num_steps])
        loss = fluid.layers.reduce_mean(loss, dim=[0])
        loss = fluid.layers.reduce_sum(loss)

        return loss, last_hidden, last_cell


class TestSaveLoadBase(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)
            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.save(main_program, "./test_1")

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.load(main_program, "./test_1.pdparams", exe)

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))


class TestSaveLoadPartial(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_program = fluid.default_main_program().clone(for_test=True)

            add_1 = fluid.layers.fc(static_last_hidden,
                                    size=hidden_size,
                                    num_flatten_dims=2,
                                    bias_attr=False)

            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.save(main_program, "./test_1")

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.load(test_program, "./test_1.pdopt", None)

            for var in test_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))
            fluid.load(test_program, "./test_1.pdmodel", None)


class TestSaveLoadSetStateDict(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)
            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.save(main_program, "./test_1")

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.load(main_program, "./test_1", exe)

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))


class TestProgramStatePartial(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_program = fluid.default_main_program().clone(for_test=True)

            add_1 = fluid.layers.fc(static_last_hidden,
                                    size=hidden_size,
                                    num_flatten_dims=2,
                                    bias_attr=False)

            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.save(main_program, os.path.join('some_dir', 'test_1'))

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            #fluid.load(test_program, "./test_1", None )
            program_state = fluid.load_program_state(
                os.path.join('some_dir', 'test_1'))

            program_state_1 = fluid.load_program_state(
                os.path.join('some_dir', 'test_1.pdparams'))

            program_state_2 = fluid.load_program_state(
                os.path.join('some_dir', 'test_1.pdopt'))

            program_state_3 = fluid.load_program_state(
                os.path.join('some_dir', 'test_1.pdmodel'))

            fluid.set_program_state(test_program, program_state)

            for var in test_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            # check 1
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.set_program_state(test_program, program_state_1)

            for var in test_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            # check 2
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.set_program_state(test_program, program_state_2)

            for var in test_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            # check 3
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.set_program_state(test_program, program_state_3)

            for var in test_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))


class TestVariableInit(unittest.TestCase):
    def test_variable_init(self):

        x = fluid.data(name="x", shape=[10, 10], dtype='float32')
        y = fluid.layers.fc(x, 10)
        z = fluid.layers.fc(y, 10)

        place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
        ) else fluid.CUDAPlace(0)
        exe = fluid.Executor(place)
        exe.run(fluid.default_startup_program())

        fluid.save(fluid.default_main_program(), "./test_path")

        def set_var(var, ndarray):
            t = var.get_tensor()
            p = t._place()
            if p.is_cpu_place():
                place = paddle.fluid.CPUPlace()
            elif p.is_cuda_pinned_place():
                place = paddle.fluid.CUDAPinnedPlace()
            else:
                p = paddle.fluid.core.Place()
                p.set_place(t._place())
                place = paddle.fluid.CUDAPlace(p.gpu_device_id())

            t.set(ndarray, place)

        program = fluid.default_main_program()
        new_scope = fluid.core.Scope()

        place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
        ) else fluid.CUDAPlace(0)
        exe = fluid.Executor(place)
        parameter_list = list(
            filter(fluid.io.is_parameter, program.list_vars()))

        fluid.core._create_loaded_parameter(parameter_list, new_scope,
                                            exe._default_executor)
        parameter_file_name = "./test_path.pdparams"
        with open(parameter_file_name, 'rb') as f:
            load_dict = pickle.load(f)

        for v in parameter_list:
            assert v.name in load_dict, \
                "Can not find [{}] in model file [{}]".format(
                    v.name, parameter_file_name)
            new_v = new_scope.find_var(v.name)
            set_var(new_v, load_dict[v.name])

        opt_list = list(
            filter(fluid.io.is_belong_to_optimizer, program.list_vars()))

        fluid.core._create_loaded_parameter(opt_list, new_scope,
                                            exe._default_executor)
        opt_file_name = "./test_path.pdopt"
        with open(opt_file_name, 'rb') as f:
            load_dict = pickle.load(f)

        for v in opt_list:
            assert v.name in load_dict, \
                "Can not find [{}] in model file [{}]".format(
                    v.name, opt_file_name)

            new_v = new_scope.find_var(v.name)
            set_var(new_v, load_dict[v.name])

        base_map = {}
        for var in program.list_vars():
            if isinstance(var, framework.Parameter) or var.persistable:
                t = np.array(fluid.global_scope().find_var(var.name)
                             .get_tensor())
                # make sure all the paramerter or optimizer var have been update
                base_map[var.name] = t

        for var in program.list_vars():
            if isinstance(var, framework.Parameter) or var.persistable:
                new_t = np.array(new_scope.find_var(var.name).get_tensor())
                base_t = base_map[var.name]

                self.assertTrue(np.array_equal(new_t, base_t))


class TestLoadFromOldInterface(unittest.TestCase):
    def setUp(self):
        if os.path.exists("test_path.pdparams"):
            os.remove("test_path.pdparams")

        if os.path.exists("test_static_load_var_list.pdparams"):
            os.remove("test_static_load_var_list.pdparams")

    def test_load_from_old_interface(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_clone_program = fluid.default_main_program().clone()
            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            #fluid.save(main_program, "./test_1")
            fluid.io.save_persistables(exe, "test_path", main_program)

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.load(main_program, "test_path", exe)

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    old_shape = np.array(ten).shape
                    new_shape = [e + 10 for e in old_shape]

                    var.desc.set_shape(new_shape)
            with self.assertRaises(RuntimeError):
                fluid.load(main_program, "test_path", exe)

            # check unused parameter

            fluid.load(test_clone_program, "test_path", exe)

    def test_load_from_old_interface_var_list(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_clone_program = fluid.default_main_program().clone()
            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            #fluid.save(main_program, "./test_1")
            fluid.io.save_persistables(exe, "test_static_load_var_list",
                                       main_program)

            # set var to zero            
            var_list = []
            for i, var in enumerate(main_program.list_vars()):
                if isinstance(var, framework.Parameter) or var.persistable:
                    if i % 2 == 0:
                        var_list.append(var)
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            fluid.load(main_program, "test_static_load_var_list", exe, var_list)
            var_list_names = [var.name for var in var_list]
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    if var.name in var_list_names:
                        # loaded vars
                        base_t = base_map[var.name]
                        self.assertTrue(np.array_equal(new_t, base_t))
                    else:
                        #not loaded vars
                        self.assertTrue(np.sum(np.abs(new_t)) == 0)


class TestLoadFromOldInterfaceSingleFile(unittest.TestCase):
    def test_load_from_old_interface(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)
            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            #fluid.save(main_program, "./test_1")
            fluid.io.save_persistables(
                exe, "test_path", main_program, filename="model_single")

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            file_model_path = os.path.join("test_path", "model_single")
            fluid.load(main_program, file_model_path, exe,
                       fluid.io.get_program_persistable_vars(main_program))

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            # test exception
            # change shape
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    old_shape = np.array(ten).shape
                    new_shape = [e + 10 for e in old_shape]

                    var.desc.set_shape(new_shape)

            with self.assertRaises(RuntimeError):
                fluid.load(main_program, file_model_path, exe,
                           fluid.io.get_program_persistable_vars(main_program))

            fluid.io.save_params(
                exe, "test_path", main_program, filename="model_single")
            with self.assertRaises(RuntimeError):
                fluid.load(main_program, file_model_path, exe,
                           fluid.io.get_program_persistable_vars(main_program))

            # check when executor is None
            with self.assertRaises(ValueError):
                fluid.load(main_program, file_model_path, None,
                           fluid.io.get_program_persistable_vars(main_program))

            # check when var list is None
            with self.assertRaises(ValueError):
                fluid.load(main_program, file_model_path, exe, None)

            # check save params, load var_list = get_program_persistable_vars
            with self.assertRaises(RuntimeError):
                temp_var = framework.Variable(
                    main_program.global_block(),
                    shape=[1],
                    name="test_temp_var")
                all_var_list = list(main_program.list_vars())
                fluid.load(main_program, file_model_path, exe,
                           all_var_list + [temp_var])


class TestProgramStateOldSave(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_program = fluid.default_main_program().clone(for_test=True)

            add_1 = fluid.layers.fc(static_last_hidden,
                                    size=hidden_size,
                                    num_flatten_dims=2,
                                    bias_attr=False)

            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.io.save_persistables(exe, "test_program_1", main_program)

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            # case 1: load basic
            program_state = fluid.load_program_state("test_program_1")
            fluid.set_program_state(main_program, program_state)
            self.check_in_static(main_program, base_map)

            # case 2: load with no need file
            def symlink_force(target, link_name):
                try:
                    self.create_symlink(target, link_name)
                except OSError as e:
                    if e.errno == errno.EEXIST:
                        os.remove(link_name)
                        self.create_symlink(target, link_name)
                    else:
                        raise e

            orig_filepath = './test_program_1/fc_0.w_0'
            symlink_filepath = './test_program_1/link_fc_0.w_0'
            # create a needless link file for coverage
            symlink_force(orig_filepath, symlink_filepath)
            program_state = fluid.load_program_state("test_program_1")
            fluid.set_program_state(main_program, program_state)
            self.check_in_static(main_program, base_map)

            # case 3: load with var_list
            program_state = fluid.load_program_state(
                "test_program_1", main_program.all_parameters())
            fluid.set_program_state(main_program, program_state)
            self.check_in_static(main_program, base_map)

        # make sure `load_program_state` can be used in dynamic graph mode
        with fluid.dygraph.guard(place):
            load_state = fluid.load_program_state("test_program_1")
            for k, v in load_state.items():
                self.assertTrue(np.array_equal(base_map[k], v))

    def create_symlink(self, target, link_name):
        try:
            os.symlink(target, link_name)
        except AttributeError:
            import ctypes
            kernel_dll = ctypes.windll.LoadLibrary("kernel32.dll")
            kernel_dll.CreateSymbolicLinkA(target, link_name, 0)

    def check_in_static(self, main_program, base_map):
        for var in main_program.list_vars():
            if isinstance(var, framework.Parameter) or var.persistable:
                new_t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                base_t = base_map[var.name]
                self.assertTrue(np.array_equal(new_t, base_t))


class TestProgramStateOldSaveSingleModel(unittest.TestCase):
    def test_ptb_rnn_cpu_float32(self):
        seed = 90
        hidden_size = 10
        vocab_size = 1000
        num_layers = 1
        num_steps = 3
        init_scale = 0.1
        batch_size = 4
        batch_num = 200

        with new_program_scope():
            fluid.default_startup_program().random_seed = seed
            fluid.default_main_program().random_seed = seed
            ptb_model = PtbModel(
                "ptb_model",
                hidden_size=hidden_size,
                vocab_size=vocab_size,
                num_layers=num_layers,
                num_steps=num_steps,
                init_scale=init_scale)

            place = fluid.CPUPlace() if not core.is_compiled_with_cuda(
            ) else fluid.CUDAPlace(0)
            exe = fluid.Executor(place)
            sgd = Adam(learning_rate=1e-3)
            x = fluid.layers.data(
                name="x", shape=[-1, num_steps], dtype='int64')
            y = fluid.layers.data(name="y", shape=[-1, 1], dtype='float32')
            init_hidden = fluid.layers.data(
                name="init_hidden", shape=[1], dtype='float32')
            init_cell = fluid.layers.data(
                name="init_cell", shape=[1], dtype='float32')

            static_loss, static_last_hidden, static_last_cell = ptb_model(
                x, y, init_hidden, init_cell)

            test_program = fluid.default_main_program().clone(for_test=True)

            add_1 = fluid.layers.fc(static_last_hidden,
                                    size=hidden_size,
                                    num_flatten_dims=2,
                                    bias_attr=False)

            sgd.minimize(static_loss)
            static_param_updated = dict()
            static_param_init = dict()

            out = exe.run(framework.default_startup_program())

            static_loss_value = None
            static_last_cell_value = None
            static_last_hidden_value = None
            for i in range(batch_num):
                x_data = np.arange(12).reshape(4, 3).astype('int64')
                y_data = np.arange(1, 13).reshape(4, 3).astype('int64')
                x_data = x_data.reshape((-1, num_steps, 1))
                y_data = y_data.reshape((-1, 1))
                init_hidden_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                init_cell_data = np.zeros(
                    (num_layers, batch_size, hidden_size), dtype='float32')
                fetch_list = [static_loss, static_last_hidden, static_last_cell]
                out = exe.run(fluid.default_main_program(),
                              feed={
                                  "x": x_data,
                                  "y": y_data,
                                  "init_hidden": init_hidden_data,
                                  "init_cell": init_cell_data
                              },
                              fetch_list=fetch_list)
                static_loss_value = out[0]
                static_last_hidden_value = out[1]
                static_last_cell_value = out[2]

            # get value before save
            main_program = framework.default_main_program()
            base_map = {}
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            fluid.io.save_persistables(
                exe, "test_program_2", main_program, filename="model_1")

            # set var to zero
            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    ten = fluid.global_scope().find_var(var.name).get_tensor()
                    ten.set(np.zeros_like(np.array(ten)), place)

                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    # make sure all the paramerter or optimizer var have been set to zero
                    self.assertTrue(np.sum(np.abs(new_t)) == 0)

            #fluid.load(test_program, "./test_1", None )
            program_state = fluid.load_program_state(
                os.path.join("test_program_2", "model_1"),
                var_list=fluid.io.get_program_persistable_vars(main_program))
            fluid.set_program_state(main_program, program_state)

            for var in main_program.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    new_t = np.array(fluid.global_scope().find_var(var.name)
                                     .get_tensor())
                    base_t = base_map[var.name]
                    self.assertTrue(np.array_equal(new_t, base_t))

            with self.assertRaises(ValueError):
                fluid.load_program_state(
                    os.path.join("test_program_2", "model_1"))

            with self.assertRaises(TypeError):
                fluid.load_program_state(
                    os.path.join("test_program_2", "model_1"),
                    var_list=["str"])

            with self.assertRaises(RuntimeError):
                fluid.load_program_state(
                    os.path.join("test_program_2", "model_1"),
                    var_list=[
                        main_program.global_block().create_var(
                            name="fake_var_name", persistable=True)
                    ])


class TestStaticSaveLoadPickle(unittest.TestCase):
    def test_pickle_protocol(self):
        # enable static mode
        paddle.enable_static()

        with new_program_scope():
            # create network
            x = paddle.static.data(
                name="static_save_load_large_x",
                shape=[None, 10],
                dtype='float32')
            z = paddle.static.nn.fc(x, 10, bias_attr=False)
            place = paddle.CPUPlace()
            exe = paddle.static.Executor(place)
            exe.run(paddle.static.default_startup_program())
            prog = paddle.static.default_main_program()

            base_map = {}
            for var in prog.list_vars():
                if isinstance(var, framework.Parameter) or var.persistable:
                    t = np.array(fluid.global_scope().find_var(var.name)
                                 .get_tensor())
                    # make sure all the paramerter or optimizer var have been update
                    self.assertTrue(np.sum(np.abs(t)) != 0)
                    base_map[var.name] = t

            path = os.path.join("test_static_save_load_pickle",
                                "pickle_protocol")

            with self.assertRaises(ValueError):
                paddle.fluid.save(prog, path, 2.0)

            with self.assertRaises(ValueError):
                paddle.fluid.save(prog, path, 1)

            with self.assertRaises(ValueError):
                paddle.fluid.save(prog, path, 5)

            protocols = [2, ]
            if sys.version_info.major >= 3 and sys.version_info.minor >= 4:
                protocols += [3, 4]
            for protocol in protocols:
                paddle.fluid.save(prog, path, protocol)
                # set var to zero
                for var in prog.list_vars():
                    if isinstance(var, framework.Parameter) or var.persistable:
                        ten = fluid.global_scope().find_var(
                            var.name).get_tensor()
                        ten.set(np.zeros_like(np.array(ten)), place)

                        new_t = np.array(fluid.global_scope().find_var(var.name)
                                         .get_tensor())
                        self.assertTrue(np.sum(np.abs(new_t)) == 0)

                paddle.fluid.load(prog, path)

                for var in prog.list_vars():
                    if isinstance(var, framework.Parameter) or var.persistable:
                        new_t = np.array(fluid.global_scope().find_var(var.name)
                                         .get_tensor())
                        base_t = base_map[var.name]
                        self.assertTrue(np.array_equal(new_t, base_t))


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