Too Much auto indentation when a comment is in the beginning of a loop inside the REPL

[SZRabinowitz]

Bug report

Bug description:

C:\Users\Admin\Downloads\python-3.13.0-embed-amd64>python
Python 3.13.0 (tags/v3.13.0:60403a5, Oct  7 2024, 09:38:07) [MSC v.1941 64 bit (AMD64)] on win32
>>> for i in range(5):
...     # a comment goes here
...         # now the repl indents to here
...             # then here
...                 print(i)
...
0
1
2
3
4
>>>
>>> for i in range(5):
...     print(i)
...     # now put a comment here
...     # no problem
...
0
1
2
3
4
>>>
>>> if i==4:
...     # comment here
...         #it indented to here
...             print("yes")
... else:
...     print("no")
...
yes
>>>
>>> def even_or_odd(num):
...     # comment here
...         #it indents too far
...             print("calculating...")
...             return 'eovdedn'[num % 2::2]
...
>>>
>>> for num in [0, 1, 2, 3, 4, 5, 100, 100000000, 1000000000000005]:
...     # comment here
...         #indents too far
...             print(f"{num} is {even_or_odd(num)}")
...
calculating...
0 is even
calculating...
1 is odd
calculating...
2 is even
calculating...
3 is odd
calculating...
4 is even
calculating...
5 is odd
calculating...
100 is even
calculating...
100000000 is even
calculating...
1000000000000005 is odd
>>>

I apologize if this has already been brought up, I couldn't find it.

The issue: In the new 3.13.0 REPL, if you open a loop, function, if statement, or anything that requires indentation, and then start the next line with a comment, it indents extra spaces.

I have a few examples above.

My PC: Windows 11
python version: 3.13.0

Steps to reproduce:

1. Download an install python 3.13.0 and open the python repl.
2. start a for loop and press enter : E.G. for i in range(5):
3. start the next line with a comment and press enter: E.G. # My comment here
4. it will indent another level which is too far

Thank you so much everyone for python development and I hope I explained the issue clearly.

CPython versions tested on:

3.13

Operating systems tested on:

Windows

[SZRabinowitz]

I also tested this in WSL2 and had the same issue:

┌──(shlomo㉿LAPTOP-0MT4TU0L)-[/mnt/c/Users/Admin/Downloads]
└─$ uv python install 3.13.0
Searching for Python versions matching: Python 3.13.0
Installed Python 3.13.0rc2 in 2.94s
 + cpython-3.13.0rc2-linux-x86_64-gnu

┌──(shlomo㉿LAPTOP-0MT4TU0L)-[/mnt/c/Users/Admin/Downloads]
└─$ uv run --python 3.13.0 -- python
Python 3.13.0rc2 (main, Sep  9 2024, 22:13:26) [Clang 18.1.8 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> for i in range(5):
...     # comment here
...         print(i)
...
0
1
2
3
4
>>>

So it is more than likely a cross platform issue, but not necessarily

[y5c4l3]

#122237

[SZRabinowitz]

Thank you for pointing out the duplicate @y5c4l3.

I am closing this issue as duplicate.