expose AppendBackward of ProgramDesc to python #4699
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wangkuiyi
previously approved these changes
Oct 11, 2017
paddle/framework/backward.h
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| const OperatorBase& forwardOp, | ||
| const std::unordered_set<std::string>& no_grad_vars); | ||
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| // TODO(someone): Add target as parameter and generate backward op |
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Let's assign this TODO to some specific person when we create it.
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JiayiFeng
reviewed
Oct 11, 2017
paddle/pybind/protobuf.cc
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| py::return_value_policy::reference) | ||
| .def("append_block", &ProgramDescBind::AppendBlock, | ||
| py::return_value_policy::reference) | ||
| .def("backward", |
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I think append_backward is a better name. backward means the process that executes gradient op one by one, not append them.
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| self.assertEqual(len(block.all_ops()), 1) | ||
| prog.backward(set()) | ||
| self.assertEqual(len(block.all_ops()), 3) |
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Add more check here to make sure additional ops are exactly what we want.
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project: #4679
fix: #4694