def info(name,age,gender,city='hz'):
	    '''
	    :param name:
	    :param age:
	    :param gender:
	    :param city: 默认参数,缺省参数，放在参数的最后面
	    :return:
	    '''
	    print('name:',name)
	    print('age:',age)
	    print('gender:',gender)
	    print('city:',city)
	    return '哈哈哈哈','打印完成'

ret = info('wang',19,'girl','bj')