import time

def write_time():
    time_format = '%Y-%m-%d %X'
    time_current = time.strftime(time_format)
    with open('information','a') as f:
        f.write("current time %s\n" %time_current)

write_time()

def test(x,y):
    print(x)
    print(y)
test(1 ,2)

def test(x,y=3):
    print(x)
    print(y)
test(1 ,4)  #默认参数非必须传递

def test(*p):        #对于实参不确定时，接受位置参数转化成元组形式
    print(p)
test(1,2,3,4)

def test(x,*args):
    print(x)
    print(args)
test(1,2,3,4)

def test(**kwargs):   #把关键字参数转化成字典的方式
    print(kwargs)
test(name =' wangming',age = '20',sex ='男')