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Released:

欢迎您对PaddlePaddle提出建议，非常感谢您对PaddlePaddle的贡献！ 在留下您的建议时，辛苦您同步提供如下信息： 版本、环境信息 1）PaddlePaddle版本：请提供您的PaddlePaddle版本号，例如1.1 2）CPU/GPU：您是否使用GPU进行训练，如是，请提供您的CUDA和cuDNN版本号 3）系统环境：请您描述系统类型、版本，例如.

Upgrade python project from paddle-1.x to paddle-2.0

Project description

Upgrade your python model from paddle-1.x to paddle-2.

Attention

paddle1to2 aims to convert python files from paddle-1.x to paddle-2 one by one, it won't handle indirect imports. e.g.

fluid.layers.Layer in 'b.py' won't get converted.So you have to make sure you have import all used paddle modules, classes, objects directly for every python file before running paddle1to2.

Install

paddle1to2 support Linux, Mac OS, Windows(Git Bash is recommended), but it requires Python 3.5.4 or higher to run. Multi-Process is supported for Linux and Mac OS, Single-Process is support for Windows, this will lead to performance difference.

1. install with pip

ATTENTION: If your device contains multiple versions of python, you may need to run the following commands instead:

1. install from source

Develop

If you are a develop, and you want to test your code quickly, you can run the following command in project directory:

Moreover, if you want to run a specific refactor, you can use the following command:

use python -m paddle1to2 -h to see full list of all refactors.

if you want to run all unittest, use command:

or use command:

to run specific test file.

Change Spec

change_spec is a python dict defined in spec.py, it defines the rules to refactor your code.

• alias: a list of alias of main alias path.to.old_api, all alias will be replaced with main alias.
• update_to: path.to.old_api will be replaced with this new api if specified.
• warning: print specified warning message when path.to.old_api is found. This field will be ignored if update_to is specified.
• args_list: is argument list of path.to.old_api.
• args_change: a list of list. It contains following format:
  • ['arg', 'new_arg']: rename a argument, e.g. func(arg=value) -> func(new_arg=value)
  • ['arg', ']: remove a argument, e.g. func(arg=value) -> func()
  • [', 'new_arg', 'default_value']: add a new argument, e.g. func(arg=value) -> func(arg=value, new_arg=default_value)
• args_warning: print specified warning message for specified argument after apply args_change.
• args_transformer: execute customized transformer on an AST node, it will be called after applying args_change to do further refactor.

Other Tools

1. find pattern of specific code snippet, usage:

find_pattern command will traverse all nodes in AST, if you see code snippet you want, type in 'y' to get pattern.

1. find match node in specific code for specific pattern, usage:

you can also specify '--print-results' option to got representation of matched node, specify '--print-lineno' to got line number of matched code.

Acknowledgements

• Bowler: Safe code refactoring for modern Python projects.
• lib2to3: A built-in python library to refactor python code.
• fissix: A backport of latest lib2to3, with enhancements.

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