def cal():
 rel = os.popen('cal').read().split('\n')
 month = rel.pop(0)
 date = rel.pop(0)
 show_calendar(month, date, rel)

def cal ( ) : rel = os . popen ( 'cal' ) . read ( ) . split ( '\n' ) month = rel . pop ( 0 ) date = rel . pop ( 0 ) show_calendar ( month , date , rel )
unixs command cal .