[MacPorts] #55977: update the py*-pip packages (py27-pip, py36-pip, etc) to add new pip select targets for major python releases such as pip2 or pip3

[MacPorts]

#55977: update the py*-pip packages (py27-pip, py36-pip, etc) to add new pip select
targets for major python releases such as pip2 or pip3
--------------------------+----------------------
  Reporter:  qbuchanan    |      Owner:  stromnov
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:
      Port:  py-pip       |
--------------------------+----------------------

Comment (by danchr):

 In [changeset:"5c7176e3b93f4034db97a5a7f93bd96515502bbf/macports-ports"
 5c7176e3b93f4034db97a5a7f93bd96515502bbf/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="5c7176e3b93f4034db97a5a7f93bd96515502bbf"
 pip_select: mention pip2 and pip3, added in 12df949b45f4

 Refs #4229
 Closes https://trac.macports.org/ticket/55977
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55977#comment:4>
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