1,寫代碼,有以下列表,按照要求實現每個功能api
li = ["alex","wusir","eric","rain","alex"]
1)計算列表的長度並輸出app
len(li)
2)列表中追加元素’seven’,並輸出添加後的列表spa
li = ["alex","wusir","eric","rain","alex"] li.append('seven') print(li)
3)請在列表的第1個位置插入元素’Tony’,並輸出添加後的列表code
li = ["alex","wusir","eric","rain","alex"] li.insert(0, 'Tony') print(li)
4)請修改列表第2個位置的元素爲’Kelly’,並輸出修改後的列表blog
li = ["alex","wusir","eric","rain","alex"] li.insert(1, 'Kelly') print(li)
5)請將列表l2=[1,’a’,3,4,’heart’]的每個元素添加到列表li中,一行代碼實現,不容許循環添加。索引
li = ["alex", "wusir", "eric", "rain", "alex"] l2 = [1, 'a', 3, 4, 'heart'] li.extend(l2) print(li)
6)請將字符串s = ‘qwert’的每個元素添加到列表li中,一行代碼實現,不容許循環添加。ip
li = ["alex", "wusir", "eric", "rain", "alex"] s = 'qwert' li.extend(s) print(li)
7)請刪除列表中的元素’eric’,並輸出添加後的列表開發
li = ["alex", "wusir", "eric", "rain", "alex"] li.remove('eric') print(li)
8)請刪除列表中的第2個元素,並輸出刪除的元素和刪除元素後的列表rem
li = ["alex", "wusir", "eric", "rain", "alex"] li.pop(2) print(li)
9)請刪除列表中的第2至4個元素,並輸出刪除元素後的列表字符串
li = ["alex", "wusir", "eric", "rain", "alex"] del li[2:4] print(li)
10)請將列表全部得元素反轉,並輸出反轉後的列表
li = ["alex", "wusir", "eric", "rain", "alex"] reversed(li) print(li)
11)請計算出‘alex’元素在列表li中出現的次數,並輸出該次數。
li = ["alex", "wusir", "eric", "rain", "alex"] print(li.count('alex'))
2,寫代碼,有以下列表,利用切片實現每個功能
li = [1,3,2,"a",4,"b",5,"c"]
1)經過對li列表的切片造成新的列表l1,l1 = [1,3,2]
li = [1,3,2,"a",4,"b",5,"c"] print(li[:3])
2)經過對li列表的切片造成新的列表l2,l2 = [’a’,4,’b’]
li = [1,3,2,"a",4,"b",5,"c"] l2 = li[3:6] print(l2)
3)經過對li列表的切片造成新的列表l3,l3 = [’1,2,4,5]
li = [1,3,2,"a",4,"b",5,"c"] l3 = li[::2] print(l3)
4)經過對li列表的切片造成新的列表l4,l4 = [3,’a’,’b’]
li = [1,3,2,"a",4,"b",5,"c"] l4=li[1:6:2] print(l4)
5)經過對li列表的切片造成新的列表l5,l5 = [‘c’]
li = [1,3,2,"a",4,"b",5,"c"] l5 = li[-1:] print(l5)
6)經過對li列表的切片造成新的列表l6,l6 = [‘b’,’a’,3]
li = [1, 3, 2, "a", 4, "b", 5, "c"] l6 = reversed(li[1:6:2]) print(list(l6))
3,寫代碼,有以下列表,按照要求實現每個功能。
lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"]
1)將列表lis中的’tt’變成大寫(用兩種方式)。
(1)第一種方法: 利用索引及upper() lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[3][2][1][0] = lis[3][2][1][0].upper() print(lis) lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[3][2][1][0] = lis[3][2][1][0].replace('tt', 'TT') print(lis) (2)第二種方法:利用插入和刪除 lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[3][2][1].insert(0, 'TT') lis[3][2][1].pop(1) print(lis)
2)將列表中的數字3變成字符串’100’(用兩種方式)。
(1)第一種方法:利用索引 lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[1] = 100 lis[3][2][1][1] = 100 print(lis) (2)第二種方法:利用插入和刪除 lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis.insert(1, 100) lis.pop(2) lis[3][2][1].insert(1, 100) lis[3][2][1].pop(2) print(lis)
3)將列表中的字符串’1’變成數字101(用兩種方式)。
(1)第一種方法:利用索引 lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[3][2][1][-1] = 101 print(lis) (2)第二種方法:利用插入和刪除 lis = [2,3,"k",["qwe",20,["k1",["tt",3,"1"]],89],"ab","adv"] lis[3][2][1].insert(3, 101) print(lis) lis[3][2][1].pop(-2) print(lis)
4,請用代碼實現:
li = ["alex","eric","rain"]
利用下劃線將列表的每個元素拼接成字符串"alex_eric_rain"
li = ["alex","eric","rain"] print("_".join(li))
5,查找列表li中的元素,移除每一個元素的空格,並找出以’A’或者’a’開頭,並以’c’結尾的全部元素,並添加到一個新列表中,最後循環打印這個新列表。
li = ["taibai ","alexC","AbC ","egon","Ritian"," Wusir"," agc"] l2 = [] for k in li: k = k.strip() if k.capitalize().startswith('A') and k.endswith('c'): l2.append(k) print(l2)
六、開發敏感詞語過濾程序,提示用戶輸入評論內容,若是用戶輸入的內容中包含特殊的字符:敏感詞列表 li = ["蒼老師","東京熱",」武藤蘭」,」波多野結衣」]則將用戶輸入的內容中的敏感詞彙替換成***.
li = ["蒼老師","東京熱","武藤蘭","波多野結衣"] while True: str1 = input('>>>').strip() if str1 in li: str1 = str1.replace(str1, '***') print(str1)
七、有以下列表li = [1,3,4’,alex’,[3,7,8,’taibai’],5,’ritian’]循環打印列表中的每一個元素,遇到列表則再循環打印出它裏面的元素。
li = [1,3,4, 'xiaom', [3,7,8, [5,6,7,8], 'taibai'],5,'hotdog'] def func(lis): for i in lis: if isinstance(i, list): return func(i) print(i) func(li)
將列表的增刪改查不一樣的方法所有寫出來
list.append(): 新增,默認在末尾追加元素
list.extend(): 迭代添加元素(熟記)
list.pop(): 刪除,默認刪除最後一個元素
list.insert(): 插入,根據索引進行插入