def challenge():
 crap = ''
 for x in range(random.randrange(15, 25)):
  crap = (crap + chr(random.randint(65, 90)))
 crap = md5(crap).digest()
 return crap

def challenge ( ) : crap = '' for x in range ( random . randrange ( 15 , 25 ) ) : crap = ( crap + chr ( random . randint ( 65 , 90 ) ) ) crap = md5 ( crap ) . digest ( ) return crap
i return some random data .