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how to use list() in python

时间: 2024-05-08 17:16:53 浏览: 92

详解python中list的使用

1、list（列表）是一种有序的集合，可以随时添加、修改、删除其中的元素。举例：listClassName = [‘Jack’,’Tom’,’Mark’] 列表可以根据索引获取元素，如：listClassName[0] ：列表索引是从0开始的，最后一个元素索引是len(listClassName)-1；如果要取最后一个元素，除了计算索引位置外，还可以用-1做索引，直接获取最后一个元素： 1.1 获取列表个数(长度)：用len()函数，可以获取列表元素的个数(元素从1开始计算的)：len(listClassName) 1.2 添加元素：用append()函数，可以再列表末尾添加元素：

The list() function in Python is used to convert an iterable (such as a tuple, set, or string) into a list. Here's an example: ```python # Create a tuple my_tuple = (1, 2, 3) # Convert the tuple into a list my_list = list(my_tuple) # Print the list print(my_list) ``` Output: ``` [1, 2, 3] ``` In this example, we create a tuple called `my_tuple` containing the values 1, 2, and 3. We then use the `list()` function to convert `my_tuple` into a list called `my_list`, which we then print to the console. You can also use the `list()` function to convert a string into a list of its individual characters: ```python # Convert a string into a list of characters my_string = "Hello, world!" char_list = list(my_string) # Print the list of characters print(char_list) ``` Output: ``` ['H', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '!'] ``` In this example, we create a string called `my_string` containing the phrase "Hello, world!" We then use the `list()` function to convert `my_string` into a list of its individual characters, which we then print to the console.

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