文法：
清單 list.pop(obj=list[-1])
pop()用于删除并傳回清單中的一個元素(預設為最後一個元素)
obj：要删除并傳回的清單元素
字典dict.pop(key[,default])
pop()用于删除字典中給定的key及對應的value，傳回被删除key對應的value，key值必須給出。給定的key值不在字典中時，傳回default值。
key:需要删除的key值(不給出會報錯)
default:若沒有字典中key值，傳回default值(給定的key值不在字典中時必須設定，否則會報錯)
執行個體：
清單
>>> list1 = [1,2,4,"hello","xy","你好"]
>>> a = list1.pop()#預設彈出最後一個元素
>>> print(a，list1)
你好 [1,2,4,"hello","xy"]
>>> list2 = [1,2,4,"hello","xy","你好"]
>>> b = list2.pop(3)#彈出清單中第四個元素
>>> print(b,list2)
hello [1,2,4,"xy","你好“]
字典
>>> dict1 = {"papa":"xy","sis":"nikki","dude":"cwy"}
>>> c = dict.pop()#不給定key值報錯
Traceback (most recent call last):
File "", line 1, in
c = dict.pop()
TypeError: unbound method dict.pop() needs an argument
>>> dict1 = {"papa":"xy","sis":"nikki","dude":"cwy"}
>>> c = dict1.pop("papa")
>>> print(c,dict1)
xy {'sis': 'nikki', 'dude': 'cwy'}
>>> dict2 = {"papa":"xy","sis":"nikki","dude":"cwy"}
>>> d = dict2.pop("www")#給定鍵不在字典内時，未設定default值報錯
Traceback (most recent call last):
File "", line 1, in
d = dict2.pop("www")
KeyError: 'www'
>>> dict2 = {"papa":"xy","sis":"nikki","dude":"cwy"}
>>> d = dict2.pop("www","不在字典内")
>>> print(d,dict2)
不在字典内 {'papa': 'xy', 'sis': 'nikki', 'dude': 'cwy'}
總結
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