[matplotlib-devel] PyQt4 in Matplotlib v2.0.0

It appears that the build of matplotlib in conda-forge does not require
pyqt5:
https://github.com/conda-forge/matplotlib-feedstock/blob/master/recipe/meta.yaml

So in your case, I would do:

conda remove pyqt5 matplotlib
conda install --channel=conda-forge matplotlib

···

On Thu, Feb 2, 2017 at 8:48 AM, Benjamin Root <ben.v.root at gmail.com> wrote:

no, pyqt5 is not a dependency for matplotlib. this looks like a conda
packaging issue.

Side note: the sourceforge mailing list is deprecated. Please use the
python.org version instead (you'll have to re-register).

Ben Root

On Thu, Feb 2, 2017 at 11:43 AM, Osborn, Raymond <rosborn at anl.gov> wrote:

I just created a new conda environment with Matplotlib included, and it
duly installed matplotlib: 2.0.0-np111py27_0. It installed PyQt5 by
default, whereas I need PyQt4, but when I installed PyQt4 (conda install
pyqt=4), it automatically downgraded Matplotlib to 1.5.1.
--------
The following packages will be DOWNGRADED due to dependency conflicts:

    matplotlib: 2.0.0-np111py27_0 --> 1.5.1-np111py27_0
    pyqt: 5.6.0-py27_2 --> 4.11.4-py27_4
    qt: 5.6.2-0 --> 4.8.7-4
--------
Is PyQt5 really a dependency for Matplotlib v2? I have been testing
release candidate versions of Matplotlib v2 without any problem. This will
cause headaches to my users who want the latest features.

Ray
--
Ray Osborn, Senior Scientist
Materials Science Division
Argonne National Laboratory
Argonne, IL 60439, USA
Phone: +1 (630) 252-9011 <(630)%20252-9011>
Email: ROsborn at anl.gov

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