切片（取指定索引范围）格式：arr[开始索引:结束索引:Step] 开始索引默认0，可不写；结束索引默认为数组的长度，获取的范围为开始索引-结束索引之间，不包括结束索引； Step默认为1。L = ['0', '1', '2', '3', '4'] print( L[0:3]) # ['0', '1', '2'] 获取从索引0开始，到索引3之间的，不包括索引3的数 print( ....

问答 2021-11-02 来自：开发者社区

Python中使用切片操作在列表对象x的开始处增加一个元素3的代码是什么呀？

文章 2018-04-22 来自：开发者社区

python高级特性：切片/迭代/列表生成式/生成器

廖雪峰老师的教程上学来的，地址：python高级特性下面以几个具体示例演示用法：一、切片 1.1 利用切片实现trim def trim(s): while s[:1] == " " or s[-1:] == " ": # 若第1个元素或最后1个元素为空格 if s[:1] == " ": s = s[1:] if s[-1...

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