Problems importing matplotlib in a virtualenv on OSX

[smacleod]

I was having problems running the first cell of the notebooks due to a problem importing matplotlib

Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework

I solved this by creating a ~/.matplotlib/matplotlibrc file containing the line backend: TkAgg. Restarting jupyter notebook was also required.

[smacleod]

Full traceback:

---

RuntimeError Traceback (most recent call last)
in ()
1 import networkx as nx
2 from datetime import datetime
----> 3 import matplotlib.pyplot as plt
4 import numpy as np
5 import warnings

/Users/smacleod/src/pycon2016-tutorials/Network-Analysis-Made-Simple/network/lib/python3.5/site-packages/matplotlib/pyplot.py in ()
112
113 from matplotlib.backends import pylab_setup
--> 114 _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
115
116 _IP_REGISTERED = None

/Users/smacleod/src/pycon2016-tutorials/Network-Analysis-Made-Simple/network/lib/python3.5/site-packages/matplotlib/backends/init.py in pylab_setup()
30 # imports. 0 means only perform absolute imports.
31 backend_mod = import(backend_name,
---> 32 globals(),locals(),[backend_name],0)
33
34 # Things we pull in from all backends

/Users/smacleod/src/pycon2016-tutorials/Network-Analysis-Made-Simple/network/lib/python3.5/site-packages/matplotlib/backends/backend_macosx.py in ()
22
23 import matplotlib
---> 24 from matplotlib.backends import _macosx
25
26

RuntimeError: Python is not installed as a framework. The Mac OS X backend will not be able to function correctly if Python is not installed as a framework. See the Python documentation for more information on installing Python as a framework on Mac OS X. Please either reinstall Python as a framework, or try one of the other backends. If you are Working with Matplotlib in a virtual enviroment see 'Working with Matplotlib in Virtual environments' in the Matplotlib FAQ

[ericmjl]

Thanks @smacleod! I will close this issue, but reference it in the README in case future participants encounter the same issue.