def zip_code():
    """Return a random ZIP code, either in `#####` or `#####-####` format."""
    format = '#####'
    if random.random() >= 0.5:
        format = '#####-####'

    result = ''
    for item in format:
        if item == '#':
            result += str(random.randint(0, 9))
        else:
            result += item

    return result
def zip_code():
    
    format = '
    if random.random() >= 0.5:
        format = '

    result = ''
    for item in format:
        if item == '
            result += str(random.randint(0, 9))
        else:
            result += item

    return result
def zip_code ( ) : format = '#####' if random . random ( ) >= 0.5 : format = '#####-####' result = '' for item in format : if item == '#' : result += str ( random . randint ( 0 , 9 ) ) else : result += item return result
Return a random ZIP code, either in `#####` or `#####-####` format.
Return a random ZIP code either in ##### or ##### - #### format .