How to use 2to3 properly for python?

python python-2.7 python-3.3 python-2to3

Install the following module which adds the 2to3 command directly to entry_points.

pip install 2to3

As it is written on 2to3 docs, to translate an entire project from one directory tree to another, use:

2to3 --output-dir=python3-version/mycode -W -n python2-version/mycode

python python-2.7 python-3.3 python-2to3

If you don't have 2to3 on your path, you can directly invoke lib2to3:

python -m lib2to3 directory\file.py

And as the docs (and other answers) mention, you can use some flags for more customization:

(there are a few more flags; see the docs for more information.)

python python-2.7 python-3.3 python-2to3

It's important to have a backup before running 2to3.
If you're using git, make a commit.
Otherwise, make a backup copy of your files.

First, run 2to3 in "soft mode" to see what it would actually do:

$ 2to3 /path/to/your/project

If you're happy with what it would do, you can then run 2to3 "for real":

$ 2to3 --write --nobackups /path/to/your/project

And now you have properly run 2to3 :)

CodeHunter