[Python] How can I use IPython interactive shell in gdb? || How can I get tab-completion to...

Normally, in Python shells I can press Tab twice to get a list of prompts.

On the other hand, in gdb's Python shell (pi or python-interactive command), there's only gdb-style completion.

Example session:

$ gdb -q
(gdb) pi
>>> gdb
<module 'gdb' from '/usr/share/gdb/python/gdb/__init__.py'>
>>> gdb.TabTab
... nothing ...
>>> show TabTab
Display all 148 possibilities? (y or n)
ada exec-direction record
agent exec-done-display remote
annotate exec-file-mismatch remoteaddresssize
[...]


Python auto complete should be at least like this.

$ python
Python 3.X.Y ...
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.TabTab
sys.abiflags sys.hash_info
sys.addaudithook( sys.hexversion
sys.api_version sys.implementation
[...]


How can I get the same/similar thing in gdb? in particular IPython shell with tab completion is fine.


Failed attempts:

• 
  This solution
  
  import readline
  import rlcompleter
  readline.parse_and_bind("tab: complete")
  
  
  makes the shell output a literal tab when Tab is pressed after sys. or similar.
  
  At least it does work for identifier tab completion (aTabTab) does list some entries)
  
  Looks like this is because of some interaction with gdb -- get_completer_delims get reset to some value every time, and if the code above is run then the tab completion outside gdb switches to "Python mode" as well.
  
  
• 
  Use background_zmq_ipython causes segmentation fault, because some gdb API (such as gdb.Value) cannot be read from outside the main thread.
  
  
• 
  Use IPython.embed() also make Tab output a literal tab character.
  
  
• 
  The official gdb documentation https://sourceware.org/gdb/current/onlinedocs/gdb/Completion.html doesn't mention anything about Python.
  

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