Is tab supposed to work in the ultratb prompt ?

I really love ultratb and I probably overuse it (instead of logging and running I often raise)

When I press tab I get a tab char inserted into the ipdb REPL.

Is tab supposed to work in ultratb or does tab completion require prompt_toolkit? Maybe it is not working on my machine or maybe it is working as it is supposed to–not sure.

If it is not supposed to work would it make sense to supply TerminalPdb instead of debugger.Pdb ? Maybe that could be exposed as a kwargs option…

Python 3.9.10 (main, Jan 17 2022, 00:00:00) 
import IPython
@>>> IPython.version_info
(8, 0, 1, '')

kitty 0.21.2 created by Kovid Goyal
fish, version 3.3.1

[Carreau]

It’s a bug. You can patch locally:

class TBTools(colorable.Colorable):
    """Basic tools used by all traceback printer classes."""

    # Number of frames to skip when reporting tracebacks
    tb_offset = 0

    def __init__(self, color_scheme='NoColor', call_pdb=False, ostream=None, parent=None, config=None):
        # Whether to call the interactive pdb debugger after printing
        ...
-        if call_pdb:
-            self.pdb = debugger.Pdb()
-        else:
-            self.pdb = None
+        self.pdb = None

And then using

sys.excepthook = ultratb.AutoFormattedTB(
    mode="Verbose",
    color_scheme="Neutral",
    call_pdb=1,
    debugger_cls=TerminalPdb,
)

Works for me.

I need to look into a proper fix, and see if it has other effects, or you can try to send a PR.

[chapmanjacobd]

Here is a quick way to test it out

python -c "import sys;from IPython.core import ultratb;from IPython.terminal.debugger import TerminalPdb;sys.excepthook=ultratb.FormattedTB(mode='Context',color_scheme='Neutral',call_pdb=1,debugger_cls=TerminalPdb);raise"