Python中的文字和变量有什​​么区别? [英] What is the difference between literal and variables in Python?

问题描述

我是Python的初学者，但是我在字面量和变量之间感到困惑.

I'm a beginner user for Python, but I get confused between literal and variables.

这是我对文字的了解:"a"+"b"

This is what I know about a literal: "a"+"b"

和变量:sentence="a"+"b"

推荐答案

文字是表示固定(const)值的符号.
变量是与符号名称关联的存储位置(如果需要，可以指向).

A literal is notation for representing a fixed (const) value.
A variable is storage location associated with a symbolic name (pointed to, if you'd like).

最好在使用中进行解释:

It's best explained in use:

foo = bar(42)
^     ^   ^
|     |   |--- literal, 42 is *literally* 42
|     |------- function, also represents "something" in memory
|------------- variable, named "foo", and the content may vary (is variable)

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