Installing MatPlotLib in windows

Question

I can't seem to get MatPlotLib to work. I downloaded and installed the correct version (matplotlib-1.1.0.win32-py2.7.exe), and I already have numpy and scipy installed (and they work with no problems).

This is the error that I get:

C:\python code>python
Python 2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib.pyplot as plt
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\matplotlib\pyplot.py", line 95, in <module>
    new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "C:\Python27\lib\site-packages\matplotlib\backends\__init__.py", line 25,
 in pylab_setup
    globals(),locals(),[backend_name])
  File "C:\Python27\lib\site-packages\matplotlib\backends\backend_tkagg.py", lin
e 8, in <module>
    import Tkinter as Tk, FileDialog
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 38, in <module>
    import FixTk
  File "C:\Python27\lib\lib-tk\FixTk.py", line 65, in <module>
    import _tkinter
ImportError: DLL load failed: %1 is not a valid Win32 application.
>>>

Any ideas?

python -c"import Tkinter" does not work. It says ImportError: DLL load failed: %1 is not a valid Win32 application. But both of those dlls are in Python27\DLLs... — Zach
– Zach, Commented Jun 4, 2012 at 21:09

Zach · Accepted Answer · 2012-06-04 21:44:22Z

7

This problem occurs when you have a previous 64-bit version of python that was incorrectly uninstalled.

Uninstalling both versions of python correctly, and then reinstalling 32-bit python fixed the problem.

answered Jun 4, 2012 at 21:44

Zach

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Comments

oz123 · Accepted Answer · 2012-06-04 19:09:40Z

3

Zach the best way to install matplotlib in windows is to go for Python(x,y) as a Bundle. All the dependencies are solved, and you get a really cool IDE and the full documentation.

See Python(x,y) here,

answered Jun 4, 2012 at 19:09

oz123

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2 Comments

Zach Over a year ago

+1 to counter the negative and for the suggestions. I would like to get my own install to work though.

oz123 Over a year ago

@Zach, you should mark your question answer, or just edit your Question to include you solution. But do give a shot to PythonX,Y it comes with an amazing IDE.

vadimmelnyk · Accepted Answer · 2014-04-16 06:53:30Z

0

Installing of 32-bit versions of all necessary libs will resolve the problem.

answered Apr 16, 2014 at 6:53

vadimmelnyk

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