python3 列表、元組操作
阿新 • • 發佈:2018-06-12
python3 列表、函數基礎操作
>> alist = [1,2,3,4,5,6,7,8,9]
>> alist
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>> alist. #兩次TAB鍵
alist.append( #添加 alist.count(9) #統計單個字符出現的次數 alist.insert( #插入在指定位置插入參數 >>> alist.insert(3,4) >>> alist [1, 2, 3, 4] alist.reverse() #倒序打印 alist.clear( alist.extend(‘new‘) #把new當成三個字符,進行添加 >>> alist.extend(‘new‘) >>> alist [1, 2, 3, 4, 5, 6, 7, 8, 9, ‘n‘, ‘e‘, ‘w‘] >>> alist.extend([‘hello‘,‘world‘]) >>> alist [1, 2, 3, 4, 5, 6, 7, 8, 9, ‘n‘, ‘e‘, ‘w‘, ‘hello‘, ‘world‘] alist.pop( #刪除,並彈出 alist.sort() #升序排序,改變列表本身 >>> alist = [3,5,2,6,2] >>> alist.sort() >>> alist [2, 2, 3, 5, 6] alist.copy( alist.index(6) #返回參數的下標,一個參數出現多次返回第一個參數的下標 >>> alist.index(6) 5 alist.remove( shuffle #打亂列表順序 >>> from random import shuffle >>> alist [97, 97, 97, 94, 79, 70, 57, 16, 11, 9] >>> shuffle(alist) >>> alist [79, 16, 97, 94, 97, 11, 97, 70, 9, 57] join: >>> str_list = [‘h‘,‘e‘,‘l‘,‘l‘,‘o‘] >>> str_list [‘h‘, ‘e‘, ‘l‘, ‘l‘, ‘o‘] >>> ‘‘.join(str_list) #將列表轉換成字符串,以空為鏈接符 ‘hello‘ >>> ‘.‘.join(str_list) #以.為鏈接符,轉換列表為字符串 ‘h.e.l.l.o‘
元組:
atuple = (1, [], 3)
>> atuple = (1, [], 3)
>> atuple
(1, [], 3)
>> atuple[1]
[]>>> atuple[1].append(2)
>> atuple
(1, [2], 3)
>> atuple[1].append(3)
>> atuple
(1, [2, 3], 3)
python3 列表、元組操作