Description

limwz01

opened on Nov 18, 2024

Issue body actions

Bug report

Bug description:

The following code is the template to illustrate the problems:

#!/usr/bin/env python3.13
g0 = 0
def main():
    import pdb
    pdb.Pdb().set_trace()
if __name__ == "__main__":
    main()

The problems:

• not re-using the same Cells for each local (this is really the biggest issue)

(Pdb) t = 1
(Pdb) f = lambda: t
(Pdb) t = 2
(Pdb) f()
1

• not obtaining the last expression (a pdb test suggests otherwise, but it is actually wrong)

(Pdb) t=10; (lambda: t)()
<no output>

(it does return a value for global g; g=1; g. but I'm at a loss as to where that value comes from)

• giving a weird result with shadowed variables (actually because it bails out):

(Pdb) g0 = 1
(Pdb) global g0; t=g0; t=(lambda: t)()
*** NameError: name 't' is not defined

• not removing annotations (not allowed for nonlocal variables)

(Pdb) t:int = 1; (lambda: t)()
*** NameError: name 't' is not defined

• using indentation to set up block scope

(Pdb) print((lambda:len("""
... """))())
7

• not remembering globals (this is arguable):

(Pdb) global g; g=1
(Pdb) t=2
(Pdb) g=(lambda: t)()
(Pdb) global g; g
1

@gaogaotiantian

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Reacted by Maciej Olko and Bill Tubbs

Activity

1. limwz01

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Nov 18, 2024
2. limwz01 commented on Nov 18, 2024

   

   limwz01

   on Nov 18, 2024

   Author

   More actions

   An approach similar to mine at https://github.com/limwz01/ipython_utils and published at https://pypi.org/project/ipython-utils/ might help here. My code is very complicated but that's also because I wanted to support dynamic reloading of the code after an exception.
3. gaogaotiantian

   self-assigned this

   on Nov 18, 2024
4. gaogaotiantian commented on Nov 18, 2024

   

   gaogaotiantian

   on Nov 18, 2024

   Member

   More actions

   Thank you for the detailed report and the many test cases. Like I said in the other issue, we might not be able to fix all of them, but I'll see if there's something cheap and readable thing I can do to fix some of these!
5. picnixz

   added

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   on Nov 21, 2024

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