def bar(mode):
 if (mode == 'div'):
  div0()
 elif (mode == 'exit'):
  try:
   stat = int(sys.argv[2])
  except:
   stat = 1
  sysexit(stat, mode)
 else:
  raise ValueError('Unknown mode')

def bar ( mode ) : if ( mode == 'div' ) : div0 ( ) elif ( mode == 'exit' ) : try : stat = int ( sys . argv [ 2 ] ) except : stat = 1 sysexit ( stat , mode ) else : raise ValueError ( 'Unknown mode' )
progress iterator .