[MacPorts] #60074: py37-matplotlib @3.1.3_0+cairo+webagg: importing fails

[MacPorts]

#60074: py37-matplotlib @3.1.3_0+cairo+webagg: importing fails
----------------------------+------------------------
  Reporter:  ladavid        |      Owner:  reneeotten
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.2
Resolution:                 |   Keywords:  catalina
      Port:  py-matplotlib  |
----------------------------+------------------------

Comment (by ladavid):

 Installing the +qt5 version didn't work for me. Also, building from source
 (port -v -s) did not work either. I too have not yet found a  workaround.

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Ticket URL: <https://trac.macports.org/ticket/60074#comment:12>
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