[MacPorts] #59303: scons: switch to python3x

[MacPorts]

#59303: scons: switch to python3x
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  Reporter:  llamafilm    |      Owner:  ryandesign
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.1
Resolution:               |   Keywords:
      Port:  scons        |
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Comment (by mf2k):

 For reference, Scons in homebrew uses python 3.8.

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Ticket URL: <https://trac.macports.org/ticket/59303#comment:4>
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