ipython -twisted weird behavior

[Yi Qiang]

I was really excited to see that one could start a twisted reactor in ipython by just giving it the -twisted flag.
However, I am not even able to get the most basic functionality to work right.

iapetus:~ > ipython -twisted
Python 2.5.2 (r252:60911, Apr 21 2008, 11:29:18)
Type "copyright", "credits" or "license" for more information.

IPython 0.8.3 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

In [1]: 2+2
Warning: Timeout for mainloop thread exceeded
switching to nonthreaded mode (until mainloop wakes up again)

In [2]:

Then when I try to exit, it just hangs indefinitely until I hit ctrl+c:

In [2]: exit()
Do you really want to exit ([y]/n)? y
^CClosing threads... Done.
Closing threads...Traceback (most recent call last):
  File "/opt/local/lib/python2.5/site-packages/ipython-0.8.3-py2.5.egg/IPython/twshell.py", line 251, in mainloop
    self.reactor.run()
  File "/opt/local/lib/python2.5/site-packages/ipython-0.8.3-py2.5.egg/IPython/twshell.py", line 229, in reactorrun
    reactorrun_orig()
  File "/opt/local/lib/python2.5/site-packages/Twisted-8.1.0-py2.5-macosx-10.3-i386.egg/twisted/internet/base.py", line 1048, in run
    self.mainLoop()
  File "/opt/local/lib/python2.5/site-packages/Twisted-8.1.0-py2.5-macosx-10.3-i386.egg/twisted/internet/base.py", line 1057, in mainLoop
    self.runUntilCurrent()
--- <exception caught here> ---
  File "/opt/local/lib/python2.5/site-packages/Twisted-8.1.0-py2.5-macosx-10.3-i386.egg/twisted/internet/base.py", line 705, in runUntilCurrent
    call.func(*call.args, **call.kw)
  File "/opt/local/lib/python2.5/site-packages/ipython-0.8.3-py2.5.egg/IPython/twshell.py", line 145, in runcode
    tokill()
  File "/opt/local/lib/python2.5/site-packages/Twisted-8.1.0-py2.5-macosx-10.3-i386.egg/twisted/internet/base.py", line 495, in stop
    "Can't stop reactor that isn't running.")
twisted.internet.error.ReactorNotRunning: Can't stop reactor that isn't running.
mainLoopThreadDeath: None
mainloop ending....

I am on OS X 10.5.3 with python 2.5.2, twisted 8.1.0 and ipython-0.8.3.

[Ville M. Vainio (villemvainio)]

This works on windows, at least. I will test with Ubuntu shortly.

[Yi Qiang (yqiang)]

On Thu, May 29, 2008 at 10:23 PM, Ville M. Vainio <email address hidden> wrote:
> This works on windows, at least. I will test with Ubuntu shortly.
>
> --
> ipython -twisted weird behavior
> https://bugs.launchpad.net/bugs/235911
> You received this bug notification because you are a direct subscriber
> of the bug.
>
Any luck on Ubuntu? I tried it on Archlinux 32bit and got pretty much
the same result. Also I thought that this was the work of Brian
Granger but he claims to have nothing to do with it :)

Cheers,
Yi

http://yiqiang.org

[Fernando Perez (fdo.perez)]

We just put 0.8.4 out with the -twisted flag fully disabled, until we can sort this out, because it's fully broken on anything but win32, and that doesn't inspire much confidence in the code actually being correct (twisted is fairly cross platform).

If you want to test it, all the -twisted option did was:

python -c"from IPython import twshell;twshell.IPShellTwisted().mainloop()"

So let us know if you have any insights on this one.

[Yi Qiang (yqiang)]

Ah, bummer. I was really excited about this feature!

On Sat, May 31, 2008 at 5:20 PM, Fernando Perez <email address hidden> wrote:
> We just put 0.8.4 out with the -twisted flag fully disabled, until we
> can sort this out, because it's fully broken on anything but win32, and
> that doesn't inspire much confidence in the code actually being correct
> (twisted is fairly cross platform).
>
> If you want to test it, all the -twisted option did was:
>
> python -c"from IPython import
> twshell;twshell.IPShellTwisted().mainloop()"
>
> So let us know if you have any insights on this one.
>
> --
> ipython -twisted weird behavior
> https://bugs.launchpad.net/bugs/235911
> You received this bug notification because you are a direct subscriber
> of the bug.
>

[Brian Granger (ellisonbg)]

This option has been removed as it was not working properly