Traceback (most recent call last):
  File "popper.py", line 1219, in <module>
    if __name__ == '__main__': main()
  File "popper.py", line 1203, in main
    accounts = Accounts()												# create Accounts object
  File "popper.py", line 167, in __init__
    on = int(on_list[i])
ValueError: invalid literal for int() with base 10: ''