pdbpp + IPython 7.16 is broken

[shwina]

Greetings!

pdbpp (latest) doesn't work with IPython (7.16.1). Attempting to use pdb commands such as u yields the following behaviour:

ipdb++> u
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<string> in <module>

~/miniconda3/envs/cudf_dev/lib/python3.7/bdb.py in trace_dispatch(self, frame, event, arg)
     86             return # None
     87         if event == 'line':
---> 88             return self.dispatch_line(frame)
     89         if event == 'call':
     90             return self.dispatch_call(frame, arg)

~/miniconda3/envs/cudf_dev/lib/python3.7/bdb.py in dispatch_line(self, frame)
    110         """
    111         if self.stop_here(frame) or self.break_here(frame):
--> 112             self.user_line(frame)
    113             if self.quitting: raise BdbQuit
    114         return self.trace_dispatch

~/miniconda3/envs/cudf_dev/lib/python3.7/pdb.py in user_line(self, frame)
    257             self._wait_for_mainpyfile = False
    258         if self.bp_commands(frame):
--> 259             self.interaction(frame, None)
    260
    261     def bp_commands(self, frame):

~/miniconda3/envs/cudf_dev/lib/python3.7/site-packages/IPython/core/debugger.py in interaction(self, frame, traceback)
    303     def interaction(self, frame, traceback):
    304         try:
--> 305             OldPdb.interaction(self, frame, traceback)
    306         except KeyboardInterrupt:
    307             self.stdout.write("\n" + self.shell.get_exception_only())

~/miniconda3/envs/cudf_dev/lib/python3.7/site-packages/pdbpp.py in interaction(self, frame, traceback)
    450         self._in_interaction = True
    451         try:
--> 452             return self._interaction(frame, traceback)
    453         finally:
    454             self._in_interaction = False

~/miniconda3/envs/cudf_dev/lib/python3.7/site-packages/pdbpp.py in _interaction(self, frame, traceback)
    486             # Use _cmdloop on py3 which catches KeyboardInterrupt.
    487             if hasattr(self, '_cmdloop'):
--> 488                 self._cmdloop()
    489             else:
    490                 self.cmdloop()

~/miniconda3/envs/cudf_dev/lib/python3.7/pdb.py in _cmdloop(self)
    317                 # the current command, so allow them during interactive input
    318                 self.allow_kbdint = True
--> 319                 self.cmdloop()
    320                 self.allow_kbdint = False
    321                 break

~/miniconda3/envs/cudf_dev/lib/python3.7/site-packages/IPython/terminal/debugger.py in cmdloop(self, intro)
    124
    125                 line = self.precmd(line)
--> 126                 stop = self.onecmd(line)
    127                 stop = self.postcmd(stop, line)
    128             self.postloop()

~/miniconda3/envs/cudf_dev/lib/python3.7/pdb.py in onecmd(self, line)
    414         """
    415         if not self.commands_defining:
--> 416             return cmd.Cmd.onecmd(self, line)
    417         else:
    418             return self.handle_command_def(line)

~/miniconda3/envs/cudf_dev/lib/python3.7/cmd.py in onecmd(self, line)
    215             except AttributeError:
    216                 return self.default(line)
--> 217             return func(arg)
    218
    219     def emptyline(self):

~/miniconda3/envs/cudf_dev/lib/python3.7/site-packages/IPython/core/debugger.py in do_up(self, arg)
    698             _newindex = self.curindex
    699             counter = 0
--> 700             hidden_frames = self.hidden_frames(self.stack)
    701             for i in range(self.curindex - 1, -1, -1):
    702                 frame = self.stack[i][0]

TypeError: 'list' object is not callable

It looks like this is due to a discrepancy between the hidden_frames attribute of pdbpp.Pdb, and the hidden_frames method of IPython.core.debugger.Pdb.

Note that the latter was introduced recently, which may explain why this behaviour is new.

[minusf]

i can confirm pdbpp (0.10.2) not working if ipython (7.18.1) is installed. the pdbpp prompt doesn't show at all and the process needs to be killed.

[shwina]

Can confirm this is fIxed in #426

[mdengler]

Thanks for pdbpp. I'd like to use it, but I use iPython, too. Is there a release scheduled to get this fix out to pypi?

[blueyed]

@mdengler
A bugfix release is being worked on / prepared in #447.

Apart from that I recommend installing it from master currently: pip install git+https://github.com/pdbpp/pdbpp@master
There are many improvements (and (other) fixes) there, and it is mainly blocked by #260, which might take longer to solve.