[MacPorts] #51391: Update pypi helpers and make python packages to use it

[MacPorts]

#51391: Update pypi helpers and make python packages to use it
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  Reporter:  xeron.oskom@…  |      Owner:  macports-tickets@…
      Type:  enhancement    |     Status:  closed
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:  fixed          |   Keywords:  haspatch
      Port:                 |
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Comment (by xeron.oskom@…):

 It works for `diffoscoppe` and it has a version. See ticket #51463 for
 livecheck change. I'm still proposing this.
 {{{
 DEBUG: Fetching https://pypi.python.org/pypi/diffoscope/json
 DEBUG: The regex is ""version": "(.+)""
 DEBUG: The regex matched ""version": "52"", extracted "52"
 diffoscope seems to have been updated (port version: 49, new version: 52)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/51391#comment:5>
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