Bug at "--period" option

[asangphukieo]

Hi, I tried the new mode "--period" option and found small bug in the main.py script at line 540. It shows "period" parameter not defind. To fix this, I just removed Line 540-543, and the script works!

if (ap.period < 0): msg = (f"Argument period is non-negative integer-value, but you have " f"specified {ap.period}. O will be used instead.") sys.stderr.write(msg)

Thank you for your nice tool. Apiwat