Python validator

Comprehensive Python code validation with syntax, style, and complexity checks.

The runtime-issue hints are estimates; please report anything missed or wrongly flagged with the link at the bottom of this page.

Python ast module
PEP 8 style guide
Cyclomatic complexity

Limits of this tool

Runs in your browser; a run is stopped after one minute.
The first use of a Python version downloads it once (about 13 MB).
The code is checked, not run.
Python 2 code is only checked for its grammar.

Python Code (required)

Python Version Check

Check PEP 8 style

Check complexity

Python 3 version used for the check

This sets which Python 3 your code is checked against: code that uses newer features is only accepted by a version that has them.

This tool runs real Python inside your browser; your code is not sent anywhere. The first time you use a Python version it is downloaded once (about 13 MB), which can take a moment.

Report a problem with this tool

Python validator

Limits of this tool

Result