# Copyright (c) 2019 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 contextlib import unittest import numpy as np import paddle import paddle.fluid as fluid import paddle.fluid.framework as framework class TestPrune(unittest.TestCase): def net(self): x = paddle.static.data(name='x', shape=[-1, 2], dtype='float32') x.desc.set_need_check_feed(False) label = paddle.static.data(name="label", shape=[-1, 1], dtype="int64") label.desc.set_need_check_feed(False) y = paddle.static.nn.fc(x=[x], size=2, activation="softmax") loss = paddle.nn.functional.cross_entropy( input=y, label=label, reduction='none', use_softmax=False ) loss = paddle.mean(x=loss) return x, y, label, loss def test_prune_with_input(self): program = framework.Program() startup_program = framework.Program() block = program.global_block() with fluid.program_guard(program, startup_program): (x, y, label, loss) = self.net() self.assertEqual(len(block.ops), 5) self.assertEqual( [op.type for op in block.ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) pruned_program = program._prune_with_input( feeded_var_names=[y.name, label.name], targets=[loss] ) self.assertEqual(len(pruned_program.global_block().ops), 2) self.assertEqual( [op.type for op in pruned_program.global_block().ops], ["softmax_with_cross_entropy", "reduce_mean"], ) def test_prune(self): program = framework.Program() startup_program = framework.Program() block = program.global_block() with fluid.program_guard(program, startup_program): (x, y, label, loss) = self.net() self.assertEqual(len(block.ops), 5) self.assertEqual( [op.type for op in block.ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) pruned_program = program._prune(targets=[loss]) self.assertEqual(len(pruned_program.global_block().ops), 5) self.assertEqual( [op.type for op in pruned_program.global_block().ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) def test_prune_target_not_list(self): program = framework.Program() startup_program = framework.Program() block = program.global_block() with fluid.program_guard(program, startup_program): (x, y, label, loss) = self.net() self.assertEqual(len(block.ops), 5) self.assertEqual( [op.type for op in block.ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) pruned_program = program._prune(targets=loss) self.assertEqual(len(pruned_program.global_block().ops), 5) self.assertEqual( [op.type for op in pruned_program.global_block().ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) def test_prune_target_none(self): program = framework.Program() startup_program = framework.Program() block = program.global_block() with fluid.program_guard(program, startup_program): (x, y, label, loss) = self.net() self.assertEqual(len(block.ops), 5) self.assertEqual( [op.type for op in block.ops], [ "mul", "elementwise_add", "softmax", "softmax_with_cross_entropy", "reduce_mean", ], ) try: pruned_program = program._prune(targets=None) except ValueError as e: self.assertIn( "All targets of Program._prune_with_input() can only be Variable or Operator", str(e), ) def mock(self, program, feed, fetch, optimize_ops): self.prune_called_times += 1 return program @contextlib.contextmanager def _mock_guard(mock): original = fluid.Executor._prune_program fluid.Executor._prune_program = mock yield fluid.Executor._prune_program = original class TestExecutorRunAutoPrune(unittest.TestCase): def net1(self): x = paddle.static.data(name='x', shape=[-1, 2], dtype='float32') x.desc.set_need_check_feed(False) label = paddle.static.data(name="label", shape=[-1, 1], dtype="int64") label.desc.set_need_check_feed(False) w_param_attrs = fluid.ParamAttr( name="fc_weight", learning_rate=0.5, initializer=paddle.nn.initializer.Constant(1.0), trainable=True, ) y = paddle.static.nn.fc( x=[x], size=2, activation="softmax", weight_attr=w_param_attrs ) loss1 = paddle.nn.functional.cross_entropy( input=y, label=label, reduction='none', use_softmax=False ) loss1 = paddle.mean(x=loss1) loss2 = paddle.nn.functional.cross_entropy( input=y, label=label, reduction='none', use_softmax=False ) loss2 = paddle.mean(x=loss2) loss1.persistable = True loss2.persistable = True return x, y, label, loss1, loss2, w_param_attrs def net2(self): x1 = paddle.static.data(name='x1', shape=[-1, 2], dtype='float32') x1.desc.set_need_check_feed(False) x2 = paddle.static.data(name='x2', shape=[-1, 2], dtype='float32') x2.desc.set_need_check_feed(False) label = paddle.static.data(name="label", shape=[-1, 1], dtype="int64") label.desc.set_need_check_feed(False) w1_param_attrs = fluid.ParamAttr( name="fc_weight1", learning_rate=0.5, initializer=paddle.nn.initializer.Constant(1.0), trainable=True, ) w2_param_attrs = fluid.ParamAttr( name="fc_weight2", learning_rate=0.5, initializer=paddle.nn.initializer.Constant(1.0), trainable=True, ) y1 = paddle.static.nn.fc( x=[x1], size=2, activation="softmax", weight_attr=w1_param_attrs ) y2 = paddle.static.nn.fc( x=[x2], size=2, activation="softmax", weight_attr=w2_param_attrs ) loss1 = paddle.nn.functional.cross_entropy( input=y1, label=label, reduction='none', use_softmax=False ) loss1 = paddle.mean(x=loss1) loss2 = paddle.nn.functional.cross_entropy( input=y2, label=label, reduction='none', use_softmax=False ) loss2 = paddle.mean(x=loss2) return ( x1, x2, y1, y2, label, loss1, loss2, w1_param_attrs, w2_param_attrs, ) def test_not_prune(self): """ If use_prune = False, the targets which is not fetched will be calculated. """ program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNotNone(scope.find_var(loss2.name)) def test_prune_fetches_without_optimizer(self): """ Prune operators and variables which are not needed to generate 'fetches'. """ program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) # loss2 is pruned weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal( weight_init, weight ) # weight not changed def test_prune_fetches_with_optimizer(self): """ Prune operators and operators which are not needed to generate 'fetches'. In train mode, the operators and operators in backward and optimization should be kept. """ program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) sgd_optimizer.minimize(loss1) exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) # loss2 is pruned weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) self.assertFalse( np.array_equal(weight_init, weight) ) # weight changed def test_prune_compiled_program(self): program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) sgd_optimizer.minimize(loss1) exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) compiled_prog = fluid.CompiledProgram(program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( compiled_prog, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) self.assertFalse( np.array_equal(weight_init, weight) ) # weight changed def test_prune_feed_without_optimizer(self): program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={y.name: x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal( weight_init, weight ) # weight unchanged def test_prune_feed_with_optimizer(self): program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) sgd_optimizer.minimize(loss1) exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') self.assertRaises( Exception, exe.run, program, feed={y.name: x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) def test_prune_with_cache_program(self): ''' When use_prune=True, Executor should cache the pruned program. If in next run, the program, feed, fetch are not changed, Executor use the cached pruned program, and needn't to call _prune_program() to prune the program. In this test, we hack the Executor._prune_program with a mock function which do nothing but increase Executor.prune_called_times, and we check prune_called_times equals 1 even if we called exe.run() 10 times with the same input arguments. ''' with _mock_guard(mock): exe = fluid.Executor(fluid.CPUPlace()) exe.prune_called_times = 0 program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) sgd_optimizer.minimize(loss1) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype( 'int64' ) for i in range(10): res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) if i == 0: self.assertEqual(exe.prune_called_times, 1) else: self.assertEqual(exe.prune_called_times, 1) def test_prune_with_cache_program2(self): ''' When use_prune=True, Executor should cache the pruned program. If the only difference in fetch_list is optimize_ops during multiple runs, the cache_keys should be different and get different pruned program. ''' with _mock_guard(mock): exe = fluid.Executor(fluid.CPUPlace()) exe.prune_called_times = 0 program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): ( x1, x2, y1, y2, label, loss1, loss2, w1_param_attrs, w2_param_attrs, ) = self.net2() adam_optimizer1 = fluid.optimizer.AdamOptimizer( learning_rate=0.5 ) train1 = adam_optimizer1.minimize(loss1) adam_optimizer2 = fluid.optimizer.AdamOptimizer( learning_rate=0.5 ) train2 = adam_optimizer2.minimize(loss2) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype( 'int64' ) for i in range(10): if i % 2: res = exe.run( program, feed={ 'x1': x_np, 'x2': x_np, 'label': label_np, }, fetch_list=[loss1, loss2, train1], use_prune=True, ) else: res = exe.run( program, feed={ 'x1': x_np, 'x2': x_np, 'label': label_np, }, fetch_list=[loss1, loss2, train2], use_prune=True, ) if i == 0: self.assertEqual(exe.prune_called_times, 1) elif i == 1: self.assertEqual(exe.prune_called_times, 2) else: self.assertEqual(exe.prune_called_times, 2) def test_prune_with_cache_compiled_program(self): ''' When use_prune=True, Executor should cache the pruned program. If in next run, the program, feed, fetch are not changed, Executor use the cached pruned program, and needn't to call _prune_program() to prune the program. In this test, we hack the Executor._prune_program with a mock function which do nothing but increase Executor.prune_called_times, and we check prune_called_times equals 1 even if we called exe.run() 10 times with the same input arguments. ''' with _mock_guard(mock): exe = fluid.Executor(fluid.CPUPlace()) exe.prune_called_times = 0 program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) sgd_optimizer.minimize(loss1) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype( 'int64' ) compiled_prog = fluid.CompiledProgram(program) for i in range(10): res = exe.run( compiled_prog, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=True, ) if i == 0: self.assertEqual(exe.prune_called_times, 1) else: self.assertEqual(exe.prune_called_times, 1) def test_prune_with_multi_optimizers(self): ''' If there are multiple optimizers in the program, we can run specific one by pass the return of optimize.minimize() to fetch_list. ''' exe = fluid.Executor(fluid.CPUPlace()) program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() # do not use_prune with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) train1, _ = sgd_optimizer.minimize(loss1) cloned_program = program.clone() train2, _ = sgd_optimizer.minimize(loss2) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_without_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) scope = fluid.Scope() # use_prune with fluid.scope_guard(scope): exe.run(startup_program) res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name, train1], use_prune=True, ) weight_with_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) # expected scope = fluid.Scope() with fluid.scope_guard(scope): exe.run(startup_program) exe.run( cloned_program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_expected = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal(weight_with_prune, weight_expected) self.assertFalse(np.array_equal(weight_without_prune, weight_expected)) def test_prune_program_with_tupe_in_fetch_list(self): ''' If there are multiple optimizers in the program, we can run specific one by pass the return of optimize.minimize() to fetch_list. ''' exe = fluid.Executor(fluid.CPUPlace()) program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() # do not use_prune with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) train1 = sgd_optimizer.minimize(loss1) cloned_program = program.clone() train2 = sgd_optimizer.minimize(loss2) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_without_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) scope = fluid.Scope() # use_prune with fluid.scope_guard(scope): exe.run(startup_program) res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name, train1], use_prune=True, ) weight_with_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) # expected scope = fluid.Scope() with fluid.scope_guard(scope): exe.run(startup_program) exe.run( cloned_program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_expected = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal(weight_with_prune, weight_expected) self.assertFalse(np.array_equal(weight_without_prune, weight_expected)) def test_prune_program_partial_parameter_updated(self): """ When running startup program, all parameters declared will be initialized. When running main program with prune=True, the pruned parameters will exist in scope and stay unchanged. """ program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): ( x1, x2, y1, y2, label, loss1, loss2, w1_param_attrs, w2_param_attrs, ) = self.net2() loss1.persistable = True loss2.persistable = True sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) train1 = sgd_optimizer.minimize(loss1) sgd_optimizer1 = fluid.optimizer.SGD(learning_rate=0.5) train2 = sgd_optimizer1.minimize(loss2) exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight1_init = np.array( scope.find_var(w1_param_attrs.name).get_tensor() ) weight2_init = np.array( scope.find_var(w2_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x1': x_np, 'label': label_np}, fetch_list=[loss1.name, train1], use_prune=True, ) self.assertIsNotNone(scope.find_var(w1_param_attrs.name)) self.assertIsNotNone(scope.find_var(w2_param_attrs.name)) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) weight1 = np.array( scope.find_var(w1_param_attrs.name).get_tensor() ) weight2 = np.array( scope.find_var(w2_param_attrs.name).get_tensor() ) self.assertFalse( np.array_equal(weight1_init, weight1) ) # weight changed np.testing.assert_array_equal( weight2_init, weight2 ) # weight2 unchanged def test_prune_override_use_prune(self): ''' If optimize_ops in provided in the fetch_list, the argument use_prune is always override to True. ''' exe = fluid.Executor(fluid.CPUPlace()) program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() # do not use_prune with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.5) train1, _ = sgd_optimizer.minimize(loss1) cloned_program = program.clone() train2, _ = sgd_optimizer.minimize(loss2) exe.run(startup_program) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_without_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) scope = fluid.Scope() # use_prune with fluid.scope_guard(scope): exe.run(startup_program) res = exe.run( program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name, train1], ) weight_with_prune = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) # expected scope = fluid.Scope() with fluid.scope_guard(scope): exe.run(startup_program) exe.run( cloned_program, feed={'x': x_np, 'label': label_np}, fetch_list=[loss1.name], use_prune=False, ) weight_expected = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal(weight_with_prune, weight_expected) self.assertFalse(np.array_equal(weight_without_prune, weight_expected)) def test_prune_feed_var_in_fetchlist_1(self): # the variable to be fed is not leaf program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={y.name: x_np, 'label': label_np}, fetch_list=[y.name, loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) self.assertIsNone(scope.find_var(x.name)) weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal( weight_init, weight ) # weight unchanged def test_prune_feed_var_in_fetchlist_2(self): # the variable to be fed is leaf program = framework.Program() startup_program = framework.Program() scope = fluid.Scope() with fluid.scope_guard(scope): with fluid.program_guard(program, startup_program): (x, y, label, loss1, loss2, w_param_attrs) = self.net1() exe = fluid.Executor(fluid.CPUPlace()) exe.run(startup_program) weight_init = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) x_np = np.random.random(size=(10, 2)).astype('float32') label_np = np.random.randint(1, size=(10, 1)).astype('int64') res = exe.run( program, feed={x.name: x_np, 'label': label_np}, fetch_list=[x.name, loss1.name], use_prune=True, ) self.assertIsNotNone(scope.find_var(loss1.name)) self.assertIsNone(scope.find_var(loss2.name)) weight = np.array( scope.find_var(w_param_attrs.name).get_tensor() ) np.testing.assert_array_equal( weight_init, weight ) # weight unchanged if __name__ == '__main__': unittest.main()