Help moding python script to edit Gcode

[snippsat]

Some fix done,try this.

import sys
import os

if len(sys.argv) != 2:
    print('Usage: python nocomment.py <file.gcode>')
    sys.exit(1)
in_file = os.path.abspath(sys.argv[1])

if not os.path.isfile(in_file):
    print(f'{in_file} does not exist!')
    sys.exit(1)

with open(in_file, 'r+') as f:
    out_lines = []
    for line in f:
        line = line.strip()
        if line.startswith(';'):
            out_lines.append(f'({line})')
        else:
            out_lines.append(line)

    if len(out_lines) > 0:
        f.seek(0)
        f.truncate()
        f.write('\n'.join(out_lines))

print(f'comment removal complete for {in_file}')