python3元组_python3 列表、元组操作
alist = [1,2,3,4,5,6,7,8,9]
alist
[1, 2, 3, 4, 5, 6, 7, 8, 9]
alist. #两次TAB键
alist.append( #添加
alist.count(9) #统计单个字符出现的次数
alist.insert( #插入在指定位置插入参数
>>> alist.insert(3,4)
>>> alist
[1, 2, 3, 4]
alist.reverse() #倒序打印
alist.clear(
alist.extend('new') #把new当成三个字符，进行添加
>>> 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( #删除，并弹出
alist.sort() #升序排序，改变列表本身
>>> alist = [3,5,2,6,2]
>>> alist.sort()
>>> alist
[2, 2, 3, 5, 6]
alist.copy(
alist.index(6) #返回参数的下标，一个参数出现多次返回第一个参数的下标
>>> alist.index(6)
5
alist.remove(
shuffle #打乱列表顺序
>>> 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) #将列表转换成字符串，以空为链接符
'hello'
>>> '.'.join(str_list) #以.为链接符，转换列表为字符串
'h.e.l.l.o'
元组：
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)