为什么即使我不输入print，python也会打印? [英] Why does python print even if I don't type print?

问题描述

print "a"; "b"

将输出:

"a"
'b'

只需在控制台中输入int或字符串，即可打印出来.

Simply typing an int or string into the console will cause it to print.

1

将输出:

1 

有什么理由或好处吗?

推荐答案

交互式Python解释器是

The interactive Python interpreter is a REPL:

一种简单的交互式计算机编程环境，它接受单个用户输入(即单个表达式)，对其进行求值，然后将结果返回给用户

a simple, interactive computer programming environment that takes single user inputs (i.e. single expressions), evaluates them, and returns the result to the user

您看到的是每个语句的返回值.考虑一个不太简单的示例，其中返回值与输入不同:

What you are seeing is the return value for each statement. Consider a slightly less simple example where the return value is different from the input:

>>> 2 + 3
5

在探索新的语言或问题领域时，REPL提供的紧密反馈回路特别有用.

The tight feedback loop provided by a REPL can be especially helpful when exploring a new language or problem domain.

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