[MacPorts] #53806: graphene @1.6.0: fails to build without python3

[MacPorts]

#53806: graphene @1.6.0: fails to build without python3
-------------------------+----------------------
  Reporter:  ryandesign  |      Owner:  dbevans
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.4.1
Resolution:              |   Keywords:  haspatch
      Port:  graphene    |
-------------------------+----------------------

Comment (by mf2k):

 While python 3.6 is the latest version of python, I think that python 3.5
 is better supported in Macports currently.

 {{{
 $ port list py35-* | wc -l
      525
 $ port list py36-* | wc -l
      336
 }}}

 and

 {{{
 $ port echo depends:python35 | wc -l
      508
 $ port echo depends:python36 | wc -l
      323
 }}}

 Maybe making a policy of using the latest python version would help get
 more py36 modules added.

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Ticket URL: <https://trac.macports.org/ticket/53806#comment:3>
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