python基础之元祖tuple

元祖是只读列表，不可哈希，可循环查询，可切片
*儿子不能改，孙子可更改--元祖里面单个元素不能更改---元祖内列表可更改
增：tu1+tu2
查：tu1[index] tu1[start_index:end_index] tu1.index(obj)
改：tu1[index][index] = obj --tuple中存在列表才可以更改
统计：len(tu1) tu1.count(obj)
1,循环：
ey:

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

for tu in tu1:

    print(tu)

2,查，切片：切片后仍返回元祖
ey:

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

tu2 = tu1[2]

print(tu2)

result:'ee'
ey:

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

tu2 = tu1[0:2]

print(tu2)

result:(1, 2, 'ee')
ey:

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

tu2 = tu1[0:5:2]

print(tu2)

result:(1, 'ee', [6, 7, 8, 'ww'])
3,改

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

tu1[4][2] = 'gai'

print(tu1)

result:(1, 2, 'ee', 3, [6, 7, 'gai', 'ww'], 4, 'hh')
4,增:追加

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

tu2 = (11,23)

print(tu1+tu2)

result:(1, 2, 'ee', 3, [6, 7, 8, 'ww'], 4, 'hh', 11, 23)
5,计算长度

tu1= (1,2,3,4)

print(len(tu1))

result:4
6,统计

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

print(tu1.count('ee'))

result:1
7,索引
ey:

tu1 = (1,2,'ee',3,[6,7,8,'ww'],4,'hh')

print(tu1.index('hh'))

result:6

巴特西

python基础之元祖tuple

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