pkg/52718: graphics/py-matplotlib-2.1.0 does not work with Python 2.7

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         52718
>Category:       pkg
>Synopsis:       graphics/py-matplotlib-2.1.0 does not work with Python 2.7
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 10 14:05:00 +0000 2017
>Originator:     Andreas Gustafsson
>Release:        NetBSD 7.0
>Organization:

>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

After installing graphics/py-matplotlib 2.1.0 from pkgsrc, attempting
to import the matplotlib module in python2.7 (2.7.14) results in the
error message "ImportError: No module named functools_lru_cache".

See also https://github.com/matplotlib/matplotlib/issues/9344 .

>How-To-Repeat:

cd /usr/pkgsrc/graphics/py-matplotlib
make install
python2.7 -m matplotlib

>Fix: