91 lines
1.4 KiB
Markdown
91 lines
1.4 KiB
Markdown
---
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title: Tuple 元组
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date: 2020-07-23 22:43:56
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tags: [Python]
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categories: [Python]
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author: Anges黎梦
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---
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## 元组 Tuple
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Python的元组与列表类似，不同之处在于元组的元素不能修改。
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元组使用小括号，列表使用方括号。
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元组创建很简单，只需要在括号中添加元素，并使用逗号隔开即可。
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## List和Tuple的区别
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- list是可以被改变的，tuple不可改变
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- 只在初始化的时候，就定义好tuple，元素 添加/删除/更新，这些都不可以。
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## 元组创建
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```
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tuple_1 = (1,2,3,4,5)
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```
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**元组在只包含一个元素时，需要在元素后面添加一个逗号**
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```
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tuple_2 = (40, )
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print(tuple_1)
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print(type(tuple_2))
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```
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### 任意无符号的对象，以逗号隔开，会被默认为元组
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```
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tuple_3 = 'abc', 'iii','poi',444,'jf3'
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print(tuple_3)
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print(type(tuple_3))
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```
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## 元组查看 等同于 list的[]使用方法
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```
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print(tuple_1[0])
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print(len(tuple_1))
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print(max(tuple_1))
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print(min(tuple_1))
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```
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## 元组拼接/组合
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```
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print(tuple_1+tuple_2)
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```
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## 删除元组
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> 禁止删除其中的某个元素，del tuple_1[0]
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```
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del tuple_2
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```
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## 重复输出
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```
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print(tuple_1*3)
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```
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## 判断包含关系
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```
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print(3 in tuple_1)
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```
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## count 元素出现次数
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```
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print(tuple_1.count(1))
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```
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## 元素在元组中的序列号index
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```
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print(tuple_1.index(4))
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```
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