1.位置传递
def message(name, address):
return 'my name is %s ,my home locate in %s.' %(name,address)
print(message('lily','shanghai'))
启用 message ,各自把lily,shanghai 传递给name,address
2.关键字传递
def message(name, ago, address):
return 'my name is %s ,%s years ago,my home locate in %s.' %(name, ago, address)
关键字传递 ,能够忽视参数次序
print(message(name = 'lily', address = 'shanghai', ago = 12))
关键字和位置互用,位置参数要在关键字前边
print(message('lily', address = 'shanghai', ago = 12))
3.默认值参数
def message(name, ago, address='shanghai'):
return 'my name is %s ,%s years ago,my home locate in %s.' %(name, ago, address)
address 该参数沒有给传递值,参数授予默认值
print(message(name='lily', ago=12))
第二次调用函数的情况下,address被取值为beijing ,已不应用默认值。
print(message(name='lily', address='beijing', ago=12))
4.包囊传递
参数被all搜集,type: tuple
def message(*all):
print(all) print(type(all))
message('a','b','c')
参数被collect搜集,type: dict
def age(**collect):
print(collect) print(type(collect))
age(lily=12, xiaoming=13, sare=14)
結果:
('a', 'b', 'c')
<class 'tuple'>
{'lily': 12, 'xiaoming': 13, 'sare': 14}
<class 'dict'>
包囊传递的关键所在界定涵数时 ,在相对元组或词典前面*或**
5.解压工具
tuple1 = [1, 4, 6]
dict1 = {'a': 'test1', 'b': 'test2', 'c': 'test3'}
print('dict1', dict1)
def use(a, b, c):
print(a, b, c)
use(**dict1) # 把词典参数解压工具 这时等同于关键字参数传递 姓名和函数定义的参数名务必要一一对应
use(*tuple1) #把元组解压工具 这时等同于位置参数传递
結果:
dict1 {'a': 'test1', 'b': 'test2', 'c': 'test3'}
test1 test2 test3
1 4 6