numbering_remover.py

import re
from pathlib import Path

pythonFilesDir = Path("Al Sweigart/Al Sweigart Bigbook of small python Projects/source codes")
pattern = r'^\d+\.'


def removeNumbering(file):
    """Removes line numbering in a copy pasted python source code."""
    with open(file, "r", encoding='utf-8') as inputFile:
        outputList = []
        for line in inputFile:
            line = re.sub(pattern, '', line).lstrip(' ')
            outputList.append(line)

        return outputList


def isNumbered(file):
    with open(file, "r", encoding='utf-8') as inputFile:
        return any(re.match(pattern, line) for line in inputFile)


def writeData(file, data):
    with open(file, "w", encoding='utf-8') as f:
        f.writelines(data)


def main():
    for file in pythonFilesDir.iterdir():
        if (
            not (file.name.startswith("numbering_remover") or file.name.startswith("project_file"))
            and (file.is_file() and isNumbered(file))
        ):
            try:
                data = removeNumbering(file)
            except Exception as e:
                raise e
            else:
                writeData(file, data)
                print(f"Removed numbering in {file.name}")


if __name__ == "__main__":
    main()