pdb lacks debugger command to list and show all user-defined variables

[FrontSide]

BPO	30938
Nosy	@FrontSide
PRs	bpo-30938: Add pdb command to show user-owned variables  #2732

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

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2017-07-15.15:44:42.001>
labels = ['3.7', 'type-feature', 'library']
title = 'pdb lacks debugger command to list and show all user-defined variables'
updated_at = <Date 2017-07-16.11:30:04.049>
user = 'https://github.com/frontside'

bugs.python.org fields:

activity = <Date 2017-07-16.11:30:04.049>
actor = 'python-dev'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-07-15.15:44:42.001>
creator = 'David Rieger'
dependencies = []
files = []
hgrepos = []
issue_num = 30938
keywords = []
message_count = 1.0
messages = ['298398']
nosy_count = 1.0
nosy_names = ['David Rieger']
pr_nums = ['2732']
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue30938'
versions = ['Python 3.7']

[FrontSide]

IPython's "who" and "whos" command provide a way to list all user-defined variables and inspect them, respectively.

At the moment, a way to work around this would be by either using e.g. "pp locals()" to list all local variables, this would however also display non-user-owned variables which makes the output less readable.
Another option would be to open an ipython shell inside the pdb shell, this is however unintuitive, just to achieve such a simple task.

pdb should offer a "who" command to list the names of all user-owned variables and a "whos" command to list all variables including their type and the assigned value, as known from ipython.

[iritkatriel]

Closing as this was abandoned by the OP.