Need command to exit PDB interactive shell

[KerrickStaley]

BPO	41096
Nosy	@serhiy-storchaka

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-06-24.02:04:35.446>
labels = ['type-feature', 'library', '3.10']
title = 'Need command to exit PDB interactive shell'
updated_at = <Date 2020-06-24.19:27:11.039>
user = 'https://bugs.python.org/KerrickStaley'

bugs.python.org fields:

activity = <Date 2020-06-24.19:27:11.039>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-06-24.02:04:35.446>
creator = 'Kerrick Staley'
dependencies = []
files = []
hgrepos = []
issue_num = 41096
keywords = []
message_count = 4.0
messages = ['372226', '372233', '372270', '372274']
nosy_count = 2.0
nosy_names = ['serhiy.storchaka', 'Kerrick Staley']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41096'
versions = ['Python 3.10']

[KerrickStaley]

In PDB, when you use "interact" to enter an interactive shell, the only way to exit that shell is to send an end-of-transmission (Ctrl+D) character. In some environments, such as Jupyter, this is awkward to do. Here is a StackOverflow post where a user encountered this issue:
https://stackoverflow.com/questions/47522316/exit-pdb-interactive-mode-from-jupyter-notebook/62546186

I think that the user should be able to type quit() in order to exit the interactive Python shell and go back to the PDB shell, similar to a regular interactive Python session. I think you should also support exit() because the Python shell supports that one as well (quit() and exit() do the same thing, I think the alias exists to help discoverability for new users).

I confirmed this issue on Python 3.6.9 and 3.8.3.

[serhiy-storchaka]

Both "exit" and "quit" and even just "q" quit the PDB interactive shell.

[KerrickStaley]

Serhiy: I'm referring to the interactive mode that can be entered by typing "interact" in PDB.

Here are reproduction instructions:

1. Run "python3" command.
2. In Python shell, type "import pdb; pdb.set_trace()".
3. In PDB shell, type "interact".

Now, in this "PDB InteractiveConsole" shell (I'm not sure what it's called), the only way to go back to PDB is to press Ctrl+D. If you type "quit()" or "exit()" it exits the entire Python process. If you type "q" it says "NameError: name 'q' is not defined".

In Jupyter, I get different (but still undesirable) behavior: "quit()" raises "NameError: name 'quit' is not defined" (and similar for "exit()").

I think "quit()"/"exit()" in these contexts should return you back to the PDB shell.

[serhiy-storchaka]

Thank you, now I understand the problem.

It is reasonable request, but a new feature can only be added in Python 3.10.

[gaogaotiantian]

exit() and quit() exits the interactive context and return to PDB console now with #102896 .