using different backends for python 2.7 and 3.6

Community matplotlib-users
1

Hi,

I'm starting to make the transition from python 2.7.x to python 3.x
(currently 3.6). I've found that for my python 3.6 installation (via
conda), the Qt4Agg backend doesn't work, but Qt5Agg does. On the other
hand, for python 2.7, Qt4Agg works, but Qt5Agg doesn't. Of course it would
be best if these issues were fixed (and there appear to be bug reports on
this) but until that happens, is there a recommended way to set the backend
other than editing the matplotlibrc file. I tried setting the MPLBACKEND
environment variable, but that didn't seem to work. I like using ipython
--pylab, especially for quick plotting. I know I could start ipython and
then do
import matplotlib
matplotlib.use("Qt5Agg")
?etc., but that's kind of a pain. Suggestions welcome.

Regards,
Jon?

···

--
________________________________________________________
Jonathan D. Slavin Harvard-Smithsonian CfA
jslavin at cfa.harvard.edu 60 Garden Street, MS 83
phone: (617) 496-7981 Cambridge, MA 02138-1516
cell: (781) 363-0035 USA
________________________________________________________
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2

You could sniff the python version in your IPython startup file.

···

On Fri, May 5, 2017 at 10:03 AM, Slavin, Jonathan <jslavin at cfa.harvard.edu> wrote:

Hi,

I'm starting to make the transition from python 2.7.x to python 3.x
(currently 3.6). I've found that for my python 3.6 installation (via
conda), the Qt4Agg backend doesn't work, but Qt5Agg does. On the other
hand, for python 2.7, Qt4Agg works, but Qt5Agg doesn't. Of course it would
be best if these issues were fixed (and there appear to be bug reports on
this) but until that happens, is there a recommended way to set the backend
other than editing the matplotlibrc file. I tried setting the MPLBACKEND
environment variable, but that didn't seem to work. I like using ipython
--pylab, especially for quick plotting. I know I could start ipython and
then do
import matplotlib
matplotlib.use("Qt5Agg")
?etc., but that's kind of a pain. Suggestions welcome.

Regards,
Jon?

--
________________________________________________________
Jonathan D. Slavin Harvard-Smithsonian CfA
jslavin at cfa.harvard.edu 60 Garden Street, MS 83
phone: (617) 496-7981 Cambridge, MA 02138-1516
cell: (781) 363-0035 USA
________________________________________________________

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