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2to3

Automated Python 2 to 3 code conversion. More information: https://docs.python.org/3/library/2to3.html.

  • Display the changes that would be performed without performing them (dry-run):

2to3 {{path/to/file.py}}

  • Convert a Python 2 file to Python 3:

2to3 --write {{path/to/file.py}}

  • Convert specific Python 2 language features to Python 3:

2to3 --write {{path/to/file.py}} --fix={{raw_input}} --fix={{print}}

  • Convert all Python 2 language features except the specified ones to Python 3:

2to3 --write {{path/to/file.py}} --nofix={{has_key}} --nofix={{isinstance}}

  • Display a list of all available language features that can be converted from Python 2 to Python 3:

2to3 --list-fixes

  • Convert all Python 2 files in a directory to Python 3:

2to3 --output-dir={{path/to/python3_directory}} --write-unchanged-files --nobackups {{path/to/python2_directory}}

  • Run 2to3 with multiple threads:

2to3 --processes={{4}} --output-dir={{path/to/python3_directory}} --write --nobackups --no-diff {{path/to/python2_directory}}