[MacPorts] #61282: python39 @3.9.0, python38 @3.8.7: +universal does not work

[MacPorts]

#61282: python39 @3.9.0, python38 @3.8.7: +universal does not work
---------------------------------+----------------------
  Reporter:  ryandesign          |      Owner:  jmroot
      Type:  defect              |     Status:  assigned
  Priority:  Normal              |  Milestone:
 Component:  ports               |    Version:  2.6.99
Resolution:                      |   Keywords:
      Port:  python39, python38  |
---------------------------------+----------------------

Comment (by kencu):

 A universal build of python39 with arm/x86_64 seems to work (on BigSur
 Intel at present):
 {{{
 % port -vq installed python39
   python39 @3.9.1_0+universal (active) platform='darwin 20' archs='arm64
 x86_64' date='2021-01-10T10:07:17-0800'

 % python3.9
 Python 3.9.1 (default, Jan 10 2021, 10:06:23)
 [Clang 12.0.0 (clang-1200.0.32.28)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import subprocess
 >>> ^D
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/61282#comment:4>
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