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                # 元組 Python的元組與列表類似,不同之處在于**元組的元素不能修改**。元組使用小括號,列表使用方括號。 ~~~ >>> aTuple = ('et',77,99.9) >>> aTuple ('et',77,99.9) ~~~ #### 訪問元組 ![](https://img.kancloud.cn/98/70/98700e2ce0acdfe796277e54f63c576e_253x137.png) #### 修改元組 ![](https://img.kancloud.cn/a4/7a/a47a25429560026b349de44a78899781_483x82.png) 說明:**python中不允許修改元組的數據,包括不能刪除其中的元素。** #### count, index index和count與字符串和列表中的用法相同 ~~~ >>> a = ('a', 'b', 'c', 'a', 'b') >>> a.index('a', 1, 3) # 注意是左閉右開區間 Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: tuple.index(x): x not in tuple >>> a.index('a', 1, 4) 3 >>> a.count('b') 2 >>> a.count('d') 0 ~~~
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