[MacPorts] #59900: Install of youtube-dl requires multiple Python modules of various versions

[MacPorts]

#59900: Install of youtube-dl requires multiple Python modules of various versions
----------------------+----------------------
  Reporter:  spmundi  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.2
Resolution:           |   Keywords:  variants
      Port:           |
----------------------+----------------------
Description changed by spmundi:

Old description:

> I am running MacPorts 2.6.2
> I have python36 installed and selected.
>
> I want to install youtube-dl.
> The install is asking me you install python27, python38 and various
> python37 modules. Here is a list:
> ffmpeg
> gdk-pixbuf2
> gobject-introspection
> graphviz
> ld64
> ld64-xcode
> libLASi
> librsvg
> nasm
> pango
> py37-beaker
> py37-mako
> py37-markdown
> py37-markupsafe
> py37-setuptools
> python27
> python37
> python38
> vala
> I do not understand how the dependencies can be requiring versions of
> Python that, even if installed, would not be the active versions.
> Evidently the sub-Portfiles of youtube-dl, aren specifying
> dependencies on these python versions. But why? Should not that depency
> be merely on python and not a specific version of python?
>
> It does no good for me to try and install using variants. EG port install
> youtube-dl -python38. There is no difference in the output. I do not wish
> to have me ports cluttered up with all manner of pythonx.x installs which
> I am not using.

New description:

 I am running MacPorts 2.6.2
 I have python36 installed and selected.

 I want to install youtube-dl.
 The install is asking me to install python27, python38 and various
 python37 modules. Here is a list:
 ffmpeg
 gdk-pixbuf2
 gobject-introspection
 graphviz
 ld64
 ld64-xcode
 libLASi
 librsvg
 nasm
 pango
 py37-beaker
 py37-mako
 py37-markdown
 py37-markupsafe
 py37-setuptools
 python27
 python37
 python38
 vala
 I do not understand how the dependencies can be requiring versions of
 Python that, even if installed, would not be the active versions.
 Evidently the sub-Portfiles of youtube-dl, aren specifying
 dependencies on these python versions. But why? Should not that depency be
 merely on python and not a specific version of python?

 It does no good for me to try and install using variants. EG port install
 youtube-dl -python38. There is no difference in the output. I do not wish
 to have me ports cluttered up with all manner of pythonx.x installs which
 I am not using.

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Ticket URL: <https://trac.macports.org/ticket/59900#comment:1>
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