[MacPorts] #71513: py312-mypy build error: TypeError: expected string or bytes-like object, got 'NoneType'

[MacPorts]

#71513: py312-mypy build error: TypeError: expected string or bytes-like object,
got 'NoneType'
-------------------------+--------------------------
  Reporter:  ashterenli  |      Owner:  tobypeterson
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.10.5
Resolution:              |   Keywords:
      Port:  py-mypy     |
-------------------------+--------------------------

Comment (by ashterenli):

 my installation was broken. Same solution as in #71401

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Ticket URL: <https://trac.macports.org/ticket/71513#comment:4>
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