Python 2.x和3.x中输入命令之间的差异 [英] Differences between input commands in Python 2.x and 3.x

问题描述

好，所以我使用了很多输入命令，并且我了解在Python2中我可以做到:

Ok, so i use a lot of input commands, and I understood that in Python2 I can do:

text = raw_input ('Text here')

但是现在我使用Python 3，我想知道两者之间有什么区别:

But now that i use Python 3 I was wondering what's the difference between:

text = input('Text here')

和:

text = eval(input('Text here'))

我何时必须使用一个或另一个?

when do I have to use the one or the other?

推荐答案

在Python 3.x中，raw_input变为input，并删除了Python 2.x的input.因此，通过在3.x中执行此操作:

In Python 3.x, raw_input became input and Python 2.x's input was removed. So, by doing this in 3.x:

text = input('Text here')

您基本上是在2.x中执行此操作:

you are basically doing this in 2.x:

text = raw_input('Text here')

在3.x中执行此操作:

Doing this in 3.x:

text = eval(input('Text here'))

与在2.x中执行此操作相同:

is the same as doing this in 2.x:

text = input('Text here')

以下是Python文档的快速摘要:

Here is a quick summary from the Python Docs:

PEP 3111:raw_input()重命名为input().也就是说，新的input() 函数从sys.stdin读取一行，并在结尾处返回 换行符已删除.如果输入终止，则它升高EOFError 过早地.要获取input()的旧行为，请使用eval(input()).

PEP 3111: raw_input() was renamed to input(). That is, the new input() function reads a line from sys.stdin and returns it with the trailing newline stripped. It raises EOFError if the input is terminated prematurely. To get the old behavior of input(), use eval(input()).

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