pyflakes

Check Python file for errors

$ pyflakes [file.py]

$ pyflakes [file1.py] [file2.py]

$ cat [file.py] | pyflakes

pyflakes [files]

pyflakes is a fast, lightweight static analysis tool that checks Python source files for common errors without executing them. It detects issues like undefined names, unused imports, redefined variables, and other logical mistakes that would cause runtime failures.
Unlike pylint or flake8, pyflakes focuses exclusively on error detection and does not check code style or formatting. This narrow scope makes it significantly faster and produces no false positives for stylistic choices, making it well-suited for integration into editors and pre-commit hooks where speed matters.

FILES

Python files to check.

Only checks for errors, not style. Faster than pylint.

Pyflakes was created for fast static analysis of Python code.

pylint(1), flake8(1), mypy(1)