problem graphing networkx with matplotlib (windows 64)

[Colin Wilder]

Hi folks,

I'm running networkx in Python 2.7 in Windows 64 bit. I've successfully installed networkx but get errors when I try to draw a graph, as follows:

import networkx as nx
G = nx.Graph()
G.add_edge("jus","civilis")
print(G.nodes())
print(G.edges())
# works so far
import matplotlib.pyplot as plt # according to the networkx.github.io tutorial, this is the first step for drawing a graph

I get the following output (running in Komodo Edit, but similar in iPython):

['jus', 'civilis']
[('jus', 'civilis')]
Traceback (most recent call last):
  File "sandbox_mxpgv.py", line 9, in <module>
    import matplotlib.pylab as plt
  File "C:\Python27\lib\site-packages\matplotlib\__init__.py", line 124, in <module>
    from . import cbook
  File "C:\Python27\lib\site-packages\matplotlib\cbook\__init__.py", line 35, in <module>
    import numpy as np
  File "C:\Python27\lib\site-packages\numpy\__init__.py", line 142, in <module>
    from . import add_newdocs
  File "C:\Python27\lib\site-packages\numpy\add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "C:\Python27\lib\site-packages\numpy\lib\__init__.py", line 8, in <module>
    from .type_check import *
  File "C:\Python27\lib\site-packages\numpy\lib\type_check.py", line 11, in <module>
    import numpy.core.numeric as _nx
  File "C:\Python27\lib\site-packages\numpy\core\__init__.py", line 14, in <module>
    from . import multiarray
ImportError: DLL load failed: %1 is not a valid Win32 application.

Can anyone help?

Thanks!

Colin

[Dmitry Zinoviev]

Your OS and various Python libraries do not match. Some of them are 32 bit, some 64 bit. You may get a more specific answer on StackOverflow - for example, here: https://stackoverflow.com/questions/19019720/importerror-dll-load-failed-1-is-not-a-valid-win32-application-but-the-dlls and https://stackoverflow.com/questions/4676433/solving-dll-load-failed-1-is-not-a-valid-win32-application-for-pygame

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Dmitry Zinoviev, Author of "Data Science Essentials in Python" 

https://pragprog.com/book/dzpyds/data-science-essentials-in-python
Professor of Computer Science, Suffolk University, Boston, MA 02114