python ????????????????????????????????????????????????????????????global???nonlocal

Posted 2020-12-29

???????????????   ram   arguments   div   UNC   print   ????????????   ?????????   global   

??????????????????

??????1.????????????????????????

??????def func(*args):    *??????????????????

??????* ???????????????????????????????????????????????????????????????????????????

def fun(*args):
    print(args)
    
fun(???aaa???,3,5,6,???ccc???)
#  ??????(???aaa???, 3, 5, 6, ???ccc???)

??????

 

??????2.????????????????????????

??????def func(**kwargs):    

????????????????????????????????????

??????func(n=7,m="aa"):

??????**?????????????????????????????????????????????????????????????????????

def fun(**kwargs):
    print(kwargs)

fun(name="Tom",age="???",hobby="???")
# ?????? {???name???: ???Tom???, ???age???: ?????????, ???hobby???: ?????????}

????????????????????????????????? => *arg(arguments)(??????????????????)  => ????????? => **kwargs(???????????????)

?????????????????????????????????????????????????????????

??????3.???????????????

??????def  fun():

????????????"""

??????????????????????????????????????????????????????

?????????????????????

??????print(fun.__doc__)    #document??????

def fun(a,b):
    """
    ??????????????????????????????????????????
    :param a:
    :param b:
    :return:
    """
    return
fun(5,6)
print(fun.__doc__)  #????????????????????????

??????

??????4.??????????????????

??????def fun(*args,**kwargs):    #????????????

????????????pass

??????*???** ?????????????????????

??????*???** ?????????????????????

def fun(*args,**kwargs):
    print(args,kwargs)
li = [???r???,???n???,???g???,???w???,???i???,???n???]
dic = {???name???: ???uzi???,???age???:?????????,???hobby???:???adc???}
fun(*li,**dic)
# ?????? (???r???, ???n???, ???g???, ???w???, ???i???, ???n???) {???name???: ???uzi???, ???age???: ?????????, ???hobby???: ???adc???}

??????

??????????????????????????????

??????1.??????????????????

???????????????????????????????????????????????????

??????2.??????????????????

??????????????????????????????

?????? globals() ???????????????????????????????????????

??????locals()    ?????????????????????????????????

a = 5  # ????????????
def fun():
    a = 10      #????????????
    print(locals())

print(globals())
fun()

??????

?????????????????????

????????????????????????????????????

a = 1
def fun():
    a = 5        
    def inner():
        a = 10   
        print(a)
    inner()
    print(a)
print(a)
fun()

??????

??????global

????????????1.???????????????????????????????????????????????????

????????????2.???????????????????????????

????????????(??????????????????????????????????????????????????????????????????????????????????????????????????????)

a = 1
def fun():
    global a
    a += 5
    print(a)  #  6
print(a)   #  1
fun()
print(a)   #  6

??????

??????nonlocal 

????????????????????????????????????????????????????????????

a = 1
def fun():
    a = 5
    def inner():
        nonlocal a
        a += 5
        print(a)    # 10
    print(a)        # 5
    inner()
    print(a)        # 10

print(a)            # 1
fun()
print(a)            # 1

??????

 

 

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