[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 reneeotten):

 okay, so you have the latest versions installed; the ones for "darwint 19"
 are active. Seeing that you still have ports installed (but not active)
 for "darwin 17" suggests to me that you perhaps recently updated to
 Catalina, correct? If that's the case did you follow the
 [https://trac.macports.org/wiki/Migration migration steps]?

 Regarding the tests: I am more interested what happens after you tell
 MacPorts to continue and actual run the tests ;)

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Ticket URL: <https://trac.macports.org/ticket/60074#comment:8>
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