Help moding python script to edit Gcode

[AntaresSky]

Interesting!
So the line in the original script L.Lstrip is different then your script Line.strip?

I take it the Line.Lstrip is telling it to removed the whole line?
But I'm still not totally clear on what the Line.strip does. Can you dumb it down a bit for me?
ORIGINAL SCRIPT:

with open(in_file, 'r+') as f:
    out_lines = []
    for line in f.readlines():
        if not line.lstrip().startswith(';'):
            out_lines.append(line)
            
    if(len(out_lines) > 0):
        f.seek(0)
        f.truncate()
        f.writelines(out_lines)

YOUR NEW AND IMPROVED SCRIPT:

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 fix complete for {in_file}')

Glen