[Matplotlib-users] ImportError on Anaconda Win64 system

[Jonno]

Argh this is what I get from trying to do too many things at once.

Correction, if I try to do:
from pylab import *  - with either WxAgg or Qt4Agg set in matplotlibrc I
get:

Python 2.7.10 |Anaconda 2.3.0 (64-bit)| (default, Oct 21 2015, 19:35:23)
[MSC v.
1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
Anaconda is brought to you by Continuum Analytics.
Please check out: http://continuum.io/thanks and https://anaconda.org
>>> from pylab import *
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\pylab.
py", line 1, in <module>
    from matplotlib.pylab import *
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\pylab.py", line 231, in <module>
    import matplotlib.finance
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\finance.py", line 38, in <module>
    from matplotlib.collections import LineCollection, PolyCollection
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\collections.py", line 27, in <module>
    import matplotlib.backend_bases as backend_bases
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\backend_bases.py", line 56, in <module>
    import matplotlib.textpath as textpath
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\textpath.py", line 22, in <module>
    from matplotlib.mathtext import MathTextParser
  File
"C:\Users\marnj\AppData\Local\Continuum\Anaconda\lib\site-packages\matplo
tlib\mathtext.py", line 63, in <module>
    import matplotlib._png as _png
ImportError: DLL load failed: The specified module could not be found.

How do I check the selected backend from within a python session?


On Fri, Oct 30, 2015 at 2:41 PM, Benjamin Root <ben.v.root at gmail.com> wrote:

> Then I suspect that the backend isn't really set properly, or matplotlib
> is picking up the parameter from somewhere else. I just don't see how
> having WxAgg as your backend could possibly trigger an import of the Qt
> libraries.
>
> On Fri, Oct 30, 2015 at 3:35 PM, Jonno <jonnojohnson at gmail.com> wrote:
>
>> Both.
>>
>> On Fri, Oct 30, 2015 at 1:08 PM, Benjamin Root <ben.v.root at gmail.com>
>> wrote:
>>
>>> Doing that from IPython or Python?
>>>
>>> On Fri, Oct 30, 2015 at 1:55 PM, Jonno <jonnojohnson at gmail.com> wrote:
>>>
>>>> I also get the same import error DLL load failed if I set the backend
>>>> to WXAgg in matplotlibrc then try from pylab import *
>>>>
>>>>
>>>>
>>>> On Fri, Oct 30, 2015 at 7:50 AM, Jens Nielsen <jenshnielsen at gmail.com>
>>>> wrote:
>>>>
>>>>> If that fails that is a bug in PyQt/Qt or in your anaconda
>>>>> installation and not a Matplotlib bug. You could try reinstall QT and PyQt.
>>>>>
>>>>> As a workaround you can tell Matplotlib to use a different backend
>>>>> http://matplotlib.org/faq/usage_faq.html#what-is-a-backend
>>>>>
>>>>> BTW the matplotlib mailing list has changed to
>>>>> matplotlib-users at python.org.
>>>>>
>>>>> best
>>>>> Jens
>>>>>
>>>>> fre. 30. okt. 2015 kl. 12.43 skrev Jonno <jonnojohnson at gmail.com>:
>>>>>
>>>>>> Traceback (most recent call last):
>>>>>>   File "<stdin>", line 1, in <module>
>>>>>> ImportError: DLL load failed: The specified module could not be found.
>>>>>>
>>>>>> On Fri, Oct 30, 2015 at 2:26 AM, Jens Nielsen <jenshnielsen at gmail.com
>>>>>> > wrote:
>>>>>>
>>>>>>> It sounds like your PyQt package is broken.
>>>>>>>
>>>>>>> What happens if you do:
>>>>>>>
>>>>>>> from PyQt4 import QtCore, QtGui
>>>>>>>
>>>>>>> in a python shell
>>>>>>>
>>>>>>> /Jens
>>>>>>>
>>>>>>> fre. 30. okt. 2015 kl. 03.06 skrev Jonno <jonnojohnson at gmail.com>:
>>>>>>>
>>>>>>>> Not sure where to post this.
>>>>>>>>
>>>>>>>> I have a fresh Anaconda Win64 python 2.7.10 install which I then
>>>>>>>> updated using conda update --all.
>>>>>>>>
>>>>>>>> If it try to:
>>>>>>>> from pylab import *
>>>>>>>> I get the following:
>>>>>>>>
>>>>>>>>
>>>>>>>> File
>>>>>>>> "~\Anaconda\lib\site-packages\matplotlib\backends\qt_compat.py", line 91,
>>>>>>>> in <module>
>>>>>>>>   from PyQt4 import QtCore, QtGui
>>>>>>>> ImportError: DLL load failed: The specified module could not be
>>>>>>>> found.
>>>>>>>>
>>>>>>>>
>>>>>>>> I have the following installed:
>>>>>>>> qt: 4.8.7
>>>>>>>> pyqt 4.11.4
>>>>>>>> matplotlib 1.4.3
>>>>>>>>
>>>>>>>> Should I open an issue on matplotlib github?
>>>>>>>>
>>>>>>>>
>>>>>>>> ------------------------------------------------------------------------------
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>>>>>>>> Matplotlib-users mailing list
>>>>>>>> Matplotlib-users at lists.sourceforge.net
>>>>>>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>
>>
>
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