Matplotlib hangs on Mac if using PySide

[spyder-bot]

From richard....@googlemail.com on 2010-09-10T17:21:18Z

Having installed spyder 2.0beta1 using easy_install on a Mac OSX everything appears fine, but matplotlib plots produce a frame which is empty and hangs. Same behaviour with a standard Python console or IPython, and IPython or Python both plot correctly when not run under spyder. The matplotlib backend doesn't seem to make a difference.

Versions are Python 2.6.6, IPython 0.10. I don't have QScintilla2 installed and test_qsci.py fails, but I understand spyder 2 doesn't need it.

Original issue: http://code.google.com/p/spyderlib/issues/detail?id=347

[spyder-bot]

From richard....@googlemail.com on 2010-09-11T14:44:18Z

The problem was not specifying -q4thread for the console options. Would it be worth detecting -pylab as a command line argument to ipython and if it's present adding -q4thread?

[spyder-bot]

From pierre.raybaut on 2010-09-12T03:14:55Z

Done!

Status: Fixed

[spyder-bot]

From pdawso...@gmail.com on 2013-07-22T10:47:51Z

Hi guys

Im having this exact problem. Plotting from Spyder 2 produces the plot frame and the rainbow wheel but thats where it ends. Running the script from Terminal produces perfect plots every time. I must admit that i don't quite understand the solution proposed above. So far i have tried selecting "Automatic" in the IPython Console Graphic tab, but no change.

Any help would be great. Thanks Peter

[spyder-bot]

From larry.da...@gmail.com on 2013-08-09T13:18:01Z

I'm having the same problem, (or I was) - matplotlib seems to work fine from other instances of python, but is just freezing under spyder 2.2.0 in Anaconda 1.6.1 (x86_64)
I tried resetting the spyder ini with "spyder --reset" but it didn't work, but it showed where the ini files are and when I checked ~/.spyder2/.spyder.ini I found that matplotlib/backend/value was set to a QT4 backend, so I switched it to matplotlib/backend/value = MacOSX
and now it works.

[spyder-bot]

From gleckm...@gmail.com on 2013-09-02T16:30:36Z

Larry,
Could you explain where I can find that ini file? I am having the same problem: the plot window hangs in my Macbook. I don't see any ini files.

[spyder-bot]

From gleckm...@gmail.com on 2013-09-02T17:05:47Z

I found the config.py file within anaconda/lib/python2.7/site-packages/spyderlib and modified the code to show this:
'matplotlib/backend/value': 'MacOSX',

and then I ran config.py but the problem did not go away.
The code snippet used to say:
'matplotlib/backend/value': 'Qt4Agg',

[spyder-bot]

From ccordoba12 on 2013-09-03T12:14:41Z

I'll tackle this for 2.2.4

Status: Accepted
Labels: MS-v2.2.4 Cat-Console OpSys-OSX

[spyder-bot]

From ccordoba12 on 2013-09-03T12:21:26Z

Summary: Matplotlib hangs on Mac if using PySide (was: Matplotlib hangs on Mac)

[spyder-bot]

From ccordoba12 on 2013-09-03T13:28:51Z

This issue was updated by revision 9beea9635ce3 .

• Change the backend on config.py so that new users pick it up.
• Also change it on our sitecustomize so that existing users can take advantage
  of this change.

Status: Fixed

[spyder-bot]

From gleckm...@gmail.com on 2013-09-03T19:19:50Z

Hi Carlos,
Is there a straightforward way for me to fix this problem (changing a config file) myself or do I need to wait for the next Spyder revision?
Cheers,
Philip

[spyder-bot]

From ccordoba12 on 2013-09-04T12:43:41Z

Please wait for the next version. It'll be released tomorrow.