Make pdb completion work with alias, convenience variables etc.

[gaogaotiantian]

Feature or enhancement

Proposal:

The current pdb completion could be improved for the following scenarios:

1. It should support alias if there is any
2. Convenience variables (starting with the $) should be supported as an expression
3. For the "command" completion, if there's no command matches, then the user is probably typing an expression to display and we should just complete as expression.

# The user probably wants $_frame
(pdb) $<tab>

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-110944: Make pdb completion work for alias and convenience vars #110945
• gh-110944: Move pty helper to test.support and add basic pdb completion test #111826
• [3.12] gh-110944: Move pty helper to test.support and add basic pdb completion test (GH-111826) #112024
• [3.11] gh-110944: Move pty helper to test.support and add basic pdb completion test (GH-111826) #112025

[encukou]

All the PRs are merged! Thank you!
It looks like there's nothing more to do in this issue, so I'll close it.