[bug fix] Fix problem where dp grad merge not compatible with ClipGradientByGlobalNorm function #36334
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FeixLiu changed the title FeixLiu changed the title 
| # We need to handle the correct block, otherwise will encounter | ||
| # a 'NotFoundError' during compile time. | ||
| block = default_main_program().current_block() | ||
| block.append_op( |
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可行，但考虑到未来存在更新g.block的可能性，使用current_block是最保险的。
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fix_dp_grad_merge_with_grad_clip_by_global_norm