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This library is a very thin wrapper around lib2to3 to utilize it to make Python 2 code more modern with the intention of eventually porting it over to Python 3.

The python-modernize command works like 2to3. Here's how you'd rewrite a single file:

python-modernize -w example.py

It does not guarantee, but it attempts to spit out a codebase compatible with Python 2.6+ or Python 3. The code that it generates has a runtime dependency on six, unless the --no-six option is used. Version 1.9.0 or later of six is recommended. Some of the fixers output code that is not compatible with Python 2.5 or lower.

Documentation: python-modernize.readthedocs.io.

See the LICENSE file for the license of python-modernize. Using this tool does not affect licensing of the modernized code.