def byte_size(number):
 (quanta, mod) = divmod(bit_size(number), 8)
 if (mod or (number == 0)):
  quanta += 1
 return quanta

def byte_size ( number ) : ( quanta , mod ) = divmod ( bit_size ( number ) , 8 ) if ( mod or ( number == 0 ) ) : quanta += 1 return quanta
returns the number of bytes required to hold a specific long number .