'as'操作符的作用是什么？(What does the 'as' operator do? [duplicate])

'as'操作符的作用是什么？(What does the 'as' operator do? [duplicate])

这个问题在这里已经有了答案：

`as`命令在Python 3.x中做了什么？ 2个答案 “with”语句是为什么设计的？ 10个答案

我正在从Zed Shaw的Learn Python the Hard Way学习Python的基础知识。 我目前正在阅读第36章（符号评论），并遇到了“as”操作符。 我需要在Python中搜索它的用法。 我知道这个问题很广泛，但是我没有在python.docs上找到任何东西，或者说SO。 这个操作员做什么？

This question already has an answer here:

What does the `as` command do in Python 3.x? 2 answers What is the python “with” statement designed for? 10 answers

I am learning the basics of Python from Zed Shaw's Learn Python the Hard Way. I am currently at chapter 36 (Symbol review), and came across the 'as' operator. I need to search for it's uses in Python. I know this question is broad, but I didn't found anything as far on python.docs, or SO. What does this operator do?

最满意答案

它用于在导入模块或使用with子句时创建别名：

import pandas as pd df = pd.DataFrame() ##### with open(file_name, 'r') as my_file: my_file.readlines()

It is used to create an alias when importing modules or when using the with clause:

import pandas as pd df = pd.DataFrame() ##### with open(file_name, 'r') as my_file: my_file.readlines()