2to3

Automated Python 2 to 3 code translation.

TLDR

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

$ 2to3 [path/to/file.py]
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Convert a Python 2 file to Python 3

$ 2to3 --write [path/to/file.py]
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Convert specific Python 2 language features to Python 3

$ 2to3 --write [path/to/file.py] --fix=[raw_input] --fix=[print]
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Convert all Python 2 language features except the specified ones to Python 3

$ 2to3 --write [path/to/file.py] --nofix=[has_key] --nofix=[isinstance]
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Display a list of all available language features that can be converted from Python 2 to Python 3

$ 2to3 --list-fixes
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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]
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Run 2to3 with multiple threads

$ 2to3 --processes=[4] --output-dir=[path/to/python3_directory] --write --nobackups --no-diff [path/to/python2_directory]
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SYNOPSIS

2to3 [options] file|dir ...

OPTIONS

-h, --help

show this help message and exit

-d, --doctests_only

Fix up doctests only

-f FIX, --fix=FIX

Each FIX specifies a transformation; default: all

-j PROCESSES, --processes=PROCESSES

Run 2to3 concurrently

-x NOFIX, --nofix=NOFIX

Prevent a transformation from being run

-l, --list-fixes

List available transformations

-p, --print-function

Modify the grammar so that print() is a function

-v, --verbose

More verbose logging

--no-diffs

Don't show diffs of the refactoring

-w, --write

Write back modified files

-n, --nobackups

Don't write backups for modified files

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