[Matplotlib-users] Failed pip install on OSX

[Matthew B. <mat...@be...>]

Hi,

Congratulations on the new release.

I just tried installing in a fresh installation of Python 2.7 from Python.org

Am I right in thinking the recommended method is:

    pip install matplotlib

?  I did this, and then:

>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pyplot.py",
line 24, in <module>
    import matplotlib.colorbar
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/colorbar.py",
line 29, in <module>
    import matplotlib.collections as collections
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/collections.py",
line 23, in <module>
    import matplotlib.backend_bases as backend_bases
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backend_bases.py",
line 50, in <module>
    import matplotlib.textpath as textpath
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/textpath.py",
line 14, in <module>
    from matplotlib.mathtext import MathTextParser
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/mathtext.py",
line 62, in <module>
    import matplotlib._png as _png
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/_png.so,
2): Library not loaded: /usr/X11/lib/libpng12.0.dylib
  Referenced from:
/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/_png.so
  Reason: Incompatible library version: _png.so requires version
42.0.0 or later, but libpng12.0.dylib provides version 36.0.0

There were no previous versions of matplotlib installed.  This on OSX 10.6:

Python 2.7.5  just installed from python.org
X11 installed from the Apple installation disks for 10.6 before `pip
install matplotlib`
No homebrew etc

Any hints about how I should debug this further?

Thanks a lot for any help,

Matthew