Search for mixed tabs/spaces in files

mixed_tabs_spaces.py

#!/usr/bin/env python3

# Uses python3. Example: `python3 mixed_tabs_spaces.py '**/*.py'`

import glob
import sys

def has_mixed_tabs_spaces(f):
    has_spaces = False
    has_tabs = False

    for line in f:
        if line.startswith(" "):
            if has_tabs:
                return True
            has_spaces = True

        if line.startswith("\t"):
            if has_spaces:
                return True
            has_tabs = True

    return False

def main():
    pattern = sys.argv[1] if len(sys.argv) > 1 else "*"

    for filepath in glob.iglob(pattern, recursive=True):
        with open(filepath, "r") as f:
            if has_mixed_tabs_spaces(f):
                print(filepath)

if __name__ == "__main__":
    main()