py25-matplotlib - 0.98.5.2 - Graphics fails when using CocoaAgg

[krunk7@…]

If CocoaAgg is set in the matplotlibrc, an error is thrown:

"must have pyObjc installed"

After installing py25-pyobjc2 (for Leopard 10.5), the following error is produced on render:

:!python2.5 temp.py  2>&1| tee /var/folders/jT/jTtjyOlwG-iLpczTAAnRIE+++TM/-Tmp-/v182152/22
Traceback (most recent call last):
  File "temp.py", line 2, in <module>
    from pylab import *
  File "/opt/local/lib/python2.5/site-packages/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/opt/local/lib/python2.5/site-packages/matplotlib/pylab.py", line 253, in <module>
    from matplotlib.pyplot import *
  File "/opt/local/lib/python2.5/site-packages/matplotlib/pyplot.py", line 75, in <module>
    new_figure_manager, draw_if_interactive, show = pylab_setup()
  File "/opt/local/lib/python2.5/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup
    globals(),locals(),[backend_name])
  File "/opt/local/lib/python2.5/site-packages/matplotlib/backends/backend_cocoaagg.py", line 26, in <module>
    from Foundation import *
ImportError: No module named Foundation

[krunk7@…]

Generic rendering code used to test CocoaAgg

[mf2k (Frank Schima)]

Please remember to use WikiFormatting.

[mf2k (Frank Schima)]

import Foundation works fine for me in python 2.5 - tested in ipython2.5. Do you have python_select installed? Have you run:

sudo python_select python25

Maybe try re-installing py25-matplotlib now that py25-pyobjc2 is installed.

[krunk7@…]

Replying to macsforever2000@…:

import Foundation works fine for me in python 2.5 - tested in ipython2.5. Do you have python_select installed? Have you run:

sudo python_select python25

jkyle ~  % which python                                  
/opt/local/bin/python
jkyle ~  % python --version
Python 2.5.4
jkyle ~  % 

Maybe try re-installing py25-matplotlib now that py25-pyobjc2 is installed.

I gave that a shot, still didn't work. Here's my current matplotlib variants args:

The following ports are currently installed:
  py25-matplotlib @0.98.5.2_0+cairo+ghostscript+gtk2+latex+wxpython (active)

I can even open up python (no ipython) and attempt to import Foundation, same error.

jkyle ~  % sudo port install py25-pyobjc2                 
--->  Fetching py25-pyobjc2
--->  Verifying checksum(s) for py25-pyobjc2
--->  Extracting py25-pyobjc2
--->  Configuring py25-pyobjc2
--->  Building py25-pyobjc2
--->  Staging py25-pyobjc2 into destroot
--->  Installing py25-pyobjc2 @2.0_0
--->  Activating py25-pyobjc2 @2.0_0
--->  Cleaning py25-pyobjc2
jkyle ~  % python
Python 2.5.4 (r254:67916, Jan  3 2009, 15:50:29) 
[GCC 4.0.1 (Apple Inc. build 5490)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import Foundation
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named Foundation
>>> 

[skymoo (Adam Mercer)]

Replying to macsforever2000@…:

import Foundation works fine for me in python 2.5 - tested in ipython2.5.

Are you sure you aren't using the system python? AFAICT py25-pyobjc2 doesn't contain the Foundation modules, therefore they won't be available to the MacPorts python.

$ port installed py25-pyobjc2
The following ports are currently installed:
  py25-pyobjc2 @2.0_0 (active)
$ port contents py25-pyobjc2 | grep Foundation
$

[jmroot (Joshua Root)]

Foundation is provided by py25-pyobjc2-cocoa.

[skymoo (Adam Mercer)]

Replying to jmr@…:

Foundation is provided by py25-pyobjc2-cocoa.

Thanks, I'll look into supporting the CocoaAgg backend

[krunk7@…]

Replying to jmr@…:

Foundation is provided by py25-pyobjc2-cocoa.

I've verified that I'm not using any system bins/libs

Ok, installing py25-pyobjc2-cocoa gets rid of the Foundation import error. However, I get this:

Traceback (most recent call last):
  File "set1.py", line 2, in <module>
    from pylab import *
  File "/opt/local/lib/python2.5/site-packages/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/opt/local/lib/python2.5/site-packages/matplotlib/pylab.py", line 253, in <module>
    from matplotlib.pyplot import *
  File "/opt/local/lib/python2.5/site-packages/matplotlib/pyplot.py", line 75, in <module>
    new_figure_manager, draw_if_interactive, show = pylab_setup()
  File "/opt/local/lib/python2.5/site-packages/matplotlib/backends/__init__.py", line 25, in pylab_setup
    globals(),locals(),[backend_name])
  File "/opt/local/lib/python2.5/site-packages/matplotlib/backends/backend_cocoaagg.py", line 54, in <module>
    class FigureCanvasCocoaAgg(FigureCanvasAgg):
  File "/opt/local/lib/python2.5/site-packages/matplotlib/backends/backend_cocoaagg.py", line 63, in FigureCanvasCocoaAgg
    start_event_loop.__doc__=FigureCanvasBase.start_event_loop_default.__doc__
NameError: name 'FigureCanvasBase' is not defined

[skymoo (Adam Mercer)]

I also get this error when running you're example script. I'll enquire with upstream.

[skymoo (Adam Mercer)]

Upstream has ​responded to my query, there's a bug that is responsible for the backtrace which is now fixed in Matplotlib SVN. However it looks like there's not that much that can be done to get your example working, as that style of animation is no longer supported; they offer some alternatives maybe those can be of use.

I'll get the port patched with the fix so we don't have to wait for a new release.

[skymoo (Adam Mercer)]

backtrace fixed in r45788

[(none)]

Milestone Port Bugs deleted