(python 3) When using raw_input(), why does the function add "\n" to the input?

Question

I searched the first page of Google but couldn't find an answer. This won't happen for int(raw_input()) weirdly enough. But if i type:

a = [raw_input() for i in range(int(raw_input()))]
print(a)

Example input: 5 1 2 3 4 5

The output will be: ['1\n', '2\n', '3\n', '4\n', '5\n']

I know this has something to do with the IDE (I run VSCode) but I have no clue how to fix it. Thank you.

just use int(input()) instead of int(raw_input()). Raw input will return you all the details including the \n — Joe Ferndz
– Joe Ferndz, Commented Jan 27, 2021 at 0:50
geeksforgeeks.org/…. Also see more information here stackoverflow.com/questions/5563089/… — Joe Ferndz
– Joe Ferndz, Commented Jan 27, 2021 at 0:51
@JoeFerndz Thanks, but that's not my question, int(raw_input()) works fine. But raw_input() at some random point today began adding \n to each input when it never did that before. I need to use raw_input because it shaves off a decent amount of time off my CP submissions. I'm not interested in the niche uses of raw_input, I'm looking at how to fix this bug. — Qiu Tony
– Qiu Tony, Commented Jan 27, 2021 at 0:56
raw_input() will always return a string value. You need to convert it to an integer if you want integer. — Joe Ferndz
– Joe Ferndz, Commented Jan 27, 2021 at 0:58
btw, if you are using 3.9 or above, 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()). — Joe Ferndz
– Joe Ferndz, Commented Jan 27, 2021 at 0:59

Jill Cheng · Accepted Answer · 2021-01-27 05:29:40Z

0

In Python3.x, raw_input() and input() are integrated, raw_input() is removed, only the input() function is retained, which receives any input, defaults all input to string processing, and returns the string type.

When use Python2.7:

When use Python3.8:

In addition, if you use extensions for debugging other than the python extension in VS Code, please try to disable it to avoid affecting the results.

My environment:

VS Code: 1.52.1 (user setup); OS: Windows_NT x64; VS Code extension: Python; Pylance;

Reference: What's new in Python3.

answered Jan 27, 2021 at 5:29

Jill Cheng

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1 Comment

Qiu Tony Over a year ago

You're goated. It was because of a new python update. Thanks

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