[MacPorts] #63069: vtk: migrate from python variants to subports

[MacPorts]

#63069: vtk: migrate from python variants to subports
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  Reporter:  mascguy      |      Owner:  stromnov
      Type:  enhancement  |     Status:  assigned
  Priority:  Low          |  Milestone:
 Component:  ports        |    Version:  2.7.2
Resolution:               |   Keywords:
      Port:  vtk          |
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Comment (by cooljeanius):

 Replying to [comment:7 mascguy]:
 > Too much on my plate to tackle this.
 >
 > And if there's no user demand, this can potentially be closed.

 There is user demand; I'm thinking this is what's blocking me from
 upgrading the various py*opencv3 ports...

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Ticket URL: <https://trac.macports.org/ticket/63069#comment:9>
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