error when starting ipython

[breisfeld]

OS: Windows 7

$ python

Python 2.7.2 |EPD 7.1-1 (32-bit)| (default, Jul  3 2011, 15:13:59) [MSC v.1500 32 bit (Intel)] on win32

ipython:
$ git describe

rel-0.13-19-g70ea9a8

$ git rev-parse HEAD

70ea9a8992045f509c99f5046cf3f48c5c05bce8

I get the following traceback when running ipython from the command line:

$ ipython

Traceback (most recent call last):
  File "C:\Python27\Scripts\ipython-script.py", line 9, in <module>
    load_entry_point('ipython==0.14.dev', 'console_scripts', 'ipython')()
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\frontend\terminal\ipapp.py", line 388, in launch_new_inst
ance
    app.initialize()
  File "<string>", line 2, in initialize
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\config\application.py", line 84, in catch_config_error
    return method(app, *args, **kwargs)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\frontend\terminal\ipapp.py", line 324, in initialize
    self.init_shell()
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\frontend\terminal\ipapp.py", line 340, in init_shell
    ipython_dir=self.ipython_dir)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\config\configurable.py", line 318, in instance
    inst = cls(*args, **kwargs)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\frontend\terminal\interactiveshell.py", line 360, in __in
it__
    user_module=user_module, custom_exceptions=custom_exceptions
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\core\interactiveshell.py", line 475, in __init__
    self.init_logstart()
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\core\interactiveshell.py", line 618, in init_logstart
    self.magic('logstart %s append' % self.logappend)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\core\interactiveshell.py", line 2161, in magic
    return self.run_line_magic(magic_name, magic_arg_s)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\core\interactiveshell.py", line 2068, in run_line_magic
    fn = self.find_line_magic(magic_name)
  File "C:\Python27\lib\site-packages\ipython-0.14.dev-py2.7.egg\IPython\core\interactiveshell.py", line 2125, in find_line_magic
    return self.magics_manager.magics['line'].get(magic_name)
AttributeError: 'NoneType' object has no attribute 'magics'

[segasai]

I also do get the same behaviour immediately after the update from 0.12.1 to 0.13 and it can be temporary "fixed" by commenting out the line setting up the logging in the config file:
c.TerminalInteractiveShell.logstart = True

[fperez]

This is really weird, it looks like a half-initialized IPython main object. @jstenar, @jdmarch, have you guys seen anything like this in any of your windows boxes? I'm not sure why something like this should be windows-specific, but since the OP is on Windows, it's at least one variable to look into.

@segasai, what OS are you using?

[jdmarch]

No, have not seen it myself nor seen it reported.

[segasai]

I'm using linux.
I've had the same issue on both RHEL6, Debian 6.

[breisfeld]

Based on segasai hint, this issue was temporarily "fixed" for me by commenting out lines associated with logging in ipython_config.py.

However, it was not sufficient to comment out the line 'c.TerminalInteractiveShell.logstart = True'; other logging-related lines had to be commented out as well, such as those associated with 'c.TerminalInteractiveShell.logfile' and 'c.TerminalInteractiveShell.logappend'.

[jstenar]

I have not seen this problem on any of my windows 7 machines

[fperez]

Could you update master and let us know if it's fixed? I just merged #2102 and it looks like that might fix it, but I want to confirm.

[segasai]

I can confirm that the bug was fixed, the ipython from the HEAD works for me now.
Thanks

[fperez]

Great, thanks. Closing then.

[breisfeld]

Using HEAD, the bug was fixed for me as well.

Thank you.