Convert python 2 to 3

Convert python 2 to 3

Use the tool at 2to3. It is installed if you have python3 installed.

2to3 filename

2to3 filename -w → write to file

It's helpful for small scripts, or to get an idea which part needs to change.

Here's a example python 2 to python 3 conversion differences, just to give a idea.

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

-o OUTPUT_DIR, --output-dir=OUTPUT_DIR

Put output files in this directory instead of overwriting the input files. Requires -n.

-W, --write-unchanged-files

Also write files even if no changes were required (useful with --output-dir); implies -w.

--add-suffix=ADD_SUFFIX

Append this string to all output filenames. Requires -n if non-empty. ex: --add-suffix='3' will generate .py3 files.