python3.x中raw_input()和input()之间有什么区别？

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The difference is that raw_input() does not exist in Python 3.x, while input() does. Actually, the old raw_input() has been renamed to input() , and the old input() is gone, but can easily be simulated by using eval(input()) . (Remember that eval() is evil, so if try to use safer ways of parsing your input if possible.)

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In Python 2 , raw_input() returns a string, and input() tries to run the input as a Python expression.

Since getting a string was almost always what you wanted, Python 3 does that with input() . As Sven says, if you ever want the old behaviour, eval(input()) works.

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Python 2:

raw_input() takes exactly what the user typed and passes it back as a string.

input() first takes the raw_input() and then performs an eval() on it as well.

The main difference is that input() expects a syntactically correct python statement where raw_input() does not.

Python 3:

raw_input() was renamed to input() so now input() returns the exact string.

Old input() was removed.

If you want to use the old input() , meaning you need to evaluate a user input as a python statement, you have to do it manually by using eval(input()) .

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