ipython qtconsole does not display the prompt on OSX

[dashesy]

Opens the GUI but does not show the welcome note, nor the prompt (to type in the commands).
Here is the warning I get (it is a warning, but the only clue I currently have):

2013-05-28 16:19:48.811 Python[1569:707] *** WARNING: Method userSpaceScaleFactor in class NSView is deprecated on 10.7 and later. It should not be used in new applications. Use convertRectToBacking: instead.

Is there any switch that I can use to get more information? Or to get some extra log?

[minrk]

Sounds like a bug in lower level code than IPython. What versions of everything: Python, Qt, PyQt/PySide, pyzmq, libzmq, IPython?

[dashesy]

python 2.7.5
qt-4.8.4
pyqt-4.10.1
pyside/1.1.2
ipython (0.13.2)
pyzmq (13.1.0)
zeromq: stable 3.2.3

Is there any verbose debugging switch I can use?

[minrk]

Is there any verbose debugging switch I can use?

ipython qtconsole --debug

[dashesy]

Thanks, but I had tried that already which did not give more information

[minrk]

What is the complete output of ipython qtconsole --debug?

[dashesy]

$ ipython qtconsole --debug
[IPythonQtConsoleApp] Config changed:
[IPythonQtConsoleApp] {'Application': {'log_level': 10}} [IPythonQtConsoleApp] Using existing profile dir: u'/Users/brettdowden/.ipython/profile_default'
[IPythonQtConsoleApp] Searching path [u'/Users/brettdowden', u'/Users/brettdowden/.ipython/profile_default'] for config files 
[IPythonQtConsoleApp] Attempting to load config file: ipython_config.py [IPythonQtConsoleApp] Config file ipython_config.py not found 
[IPythonQtConsoleApp] Attempting to load config file: ipython_qtconsole_config.py
[IPythonQtConsoleApp] Config file not found, skipping: ipython_qtconsole_config.py 
[IPythonQtConsoleApp] Connection File not found: /Users/brettdowden/.ipython/profile_default/security/kernel-7864.json
[IPKernelApp] Config changed:
[IPKernelApp] {'KernelApp': {'parent_appname': 'ipython-qtconsole'}, 'IPKernelApp': {'log_level': 10, 'connection_file': u'/Users/brettdowden/.ipython/profile_default/security/kernel-7864.json', 'parent': 1}} 
[IPKernelApp] Using existing profile dir: u'/Users/brettdowden/.ipython/profile_default'
[IPKernelApp] Searching path [u'/Users/brettdowden', u'/Users/brettdowden/.ipython/profile_default'] for config files
[IPKernelApp] Attempting to load config file: ipython_config.py 
[IPKernelApp] Config file ipython_config.py not found 
[IPKernelApp] Attempting to load config file: ipython_qtconsole_config.py 
[IPKernelApp] Config file not found, skipping: ipython_qtconsole_config.py 
[IPKernelApp] Loading connection file /Users/brettdowden/.ipython/profile_default/security/kernel-7864.json
[IPKernelApp] Starting the kernel at pid: 7865 
[IPKernelApp] shell ROUTER Channel on port: 55632 
[IPKernelApp] iopub PUB Channel on port: 55633 
[IPKernelApp] stdin ROUTER Channel on port: 55634 
[IPKernelApp] Heartbeat REP Channel on port: 55635 
[IPKernelApp] To connect another client to this kernel, use:
[IPKernelApp] --existing kernel-7864.json
2013-05-29 08:40:47.637 Python[7864:707] *** WARNING: Method userSpaceScaleFactor in class NSView is deprecated on 10.7 and later. It should not be used in new applications. Use convertRectToBacking: instead. 

[minrk]

Can you connect a terminal console to the running kernel with

ipython console --existing kernel-7864.json

after starting?

Can you confirm that all processes are running with

ps aux | grep -i ipython

[dashesy]

Grep says ipython is running:
$ ps aux | grep -i ipython
brettdowden 9506 0.5 0.5 2726164 85312 s000 S+ 1:03PM 0:01.60 /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python /usr/local/share/python/ipython qtconsole --debug

But cannot connect to the kernel; some problem with pyreadline which I assumed is not needed for qtconsole (I might have been wrong):

$ ipython console --existing kernel-9506.json
Traceback (most recent call last):
File "/usr/local/share/python/ipython", line 9, in
load_entry_point('ipython==0.13.2', 'console_scripts', 'ipython')()
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 388, in launch_new_instance
app.initialize()
File "", line 2, in initialize
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, _args, *_kwargs)
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 313, in initialize
super(TerminalIPythonApp, self).initialize(argv)
File "", line 2, in initialize
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, _args, *_kwargs)
File "/usr/local/lib/python2.7/site-packages/IPython/core/application.py", line 325, in initialize
self.parse_command_line(argv)
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/ipapp.py", line 308, in parse_command_line
return super(TerminalIPythonApp, self).parse_command_line(argv)
File "", line 2, in parse_command_line
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, _args, *_kwargs)
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 420, in parse_command_line
return self.initialize_subcommand(subc, subargv)
File "", line 2, in initialize_subcommand
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 84, in catch_config_error
return method(app, _args, *_kwargs)
File "/usr/local/lib/python2.7/site-packages/IPython/config/application.py", line 352, in initialize_subcommand
subapp = import_item(subapp)
File "/usr/local/lib/python2.7/site-packages/IPython/utils/importstring.py", line 40, in import_item
module = import(package,fromlist=[obj])
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/console/app.py", line 34, in
from IPython.frontend.terminal.console.interactiveshell import ZMQTerminalInteractiveShell
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/console/interactiveshell.py", line 33, in
from IPython.frontend.terminal.console.completer import ZMQCompleter
File "/usr/local/lib/python2.7/site-packages/IPython/frontend/terminal/console/completer.py", line 2, in
import readline
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/readline.py", line 6, in
from pyreadline.rlmain import Readline
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/pyreadline/init.py", line 11, in
from . import unicode_helper, logger, clipboard, lineeditor, modes, console
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/pyreadline/modes/init.py", line 3, in
from . import emacs, notemacs, vi
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/pyreadline/modes/emacs.py", line 16, in
from . import basemode
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/pyreadline/modes/basemode.py", line 14, in
from pyreadline.keysyms.common import make_KeyPress_from_keydescr
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pyreadline-2.0-py2.7.egg/pyreadline/keysyms/init.py", line 7, in
from . import winconstants
ImportError: cannot import name winconstants

[minrk]

how/why do you have pyreadline? pyreadline is only for Windows.

[dashesy]

I think I got the habit of installing it after having problem with tab completion, and apparently forgot the reason behind it.
Sure enough, now I uninstalled it and everything runs again, problem resolved, thanks

I thought pyreadline should not affect qtconsole because qt has its own input handling, but it seems installing pyreadline changes things that it should not.

[minrk]

IPython will not be able to import readline if pyreadline is installed on platforms other than OS X. The QtConsole doesn't use readline, but it is probably imported as a side effect of something lower level.