python学习-18 元组
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2022-05-26 14:28:30
tuple 1.元组tuple类似列表,由小括号()括住,其中的元素不可被修改,不能被增加或删除、 运行结果: ps:建议在最后加一个逗号,便于分辨(不会报错,但列表会) 2.取值 通过索引: 运行结果: 通过切片: 运行结果: for循环: 运算结果: 3.转换 转换成列表: 运行结果 转换成字符 ......
tuple
1.元组tuple类似列表,由小括号()括住,其中的元素不可被修改,不能被增加或删除、
tu = (222,222123123,("小胡子",444),12341,"你好啊",["小明",123],) print(tu)
运行结果:
(222, 222123123, ('小胡子', 444), 12341, '你好啊', ['小明', 123]) process finished with exit code 0
ps:建议在最后加一个逗号,便于分辨(不会报错,但列表会)
2.取值
通过索引:
tu = (222,222123123,("小胡子",444),12341,"你好啊",["小明",123],) a = tu[0] print(a)
运行结果:
222 process finished with exit code 0
通过切片:
tu = (222,222123123,("小胡子",444),12341,"你好啊",["小明",123],) a = tu[0:5] print(a)
运行结果:
(222, 222123123, ('小胡子', 444), 12341, '你好啊') process finished with exit code 0
for循环:
tu = (222,222123123,("小胡子",444),12341,"你好啊",["小明",123],) for a in tu : print(a)
运算结果:
222 222123123 ('小胡子', 444) 12341 你好啊 ['小明', 123] process finished with exit code 0
3.转换
转换成列表:
tu = (222,"你好啊",["小明",123],) a = list(tu) print(a)
运行结果
[222, '你好啊', ['小明', 123]] process finished with exit code 0
转换成字符串:
tu = (222,"你好啊",["小明",123],) b =" " for a in tu: b = b + str(a) print(b)
运行结果:
222你好啊['小明', 123] process finished with exit code 0
ps:元组基本功能和列表是一样的。
4.元组一级元素无法增删改,但是里面的元素如果是列表是可以增删改的
tu = (222,"你好啊",["小明",123],) tu[2][0]=132 print(tu)
运算结果:
(222, '你好啊', [132, 123]) process finished with exit code 0
5.元组的方法
count 获取元素的个数
index 获取元素的索引
同列表的方法。