[tor-bugs] #29495 [Webpages/Website]: Running site fails with python 2.x

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#29495: Running site fails with python 2.x
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 Reporter:  atagar            |          Owner:  hiro
     Type:  defect            |         Status:  new
 Priority:  Medium            |      Milestone:
Component:  Webpages/Website  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:                    |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
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Comment (by atagar):

 Hi Hiro, I installed lector via their
 [https://www.getlektor.com/downloads/ download instructions]. Lector works
 under both python2 or python3, and installs under whatever the first
 'python' executable in your path points to (which for most people is
 python2).

 To reinstall lector with python3 I adjusted their
 [https://www.getlektor.com/install.sh install.sh] a tad to instead pick
 the python3 executable.

 > The idea is that python2 will not be supported in a few months

 That is incorrect. Python will [https://pythonclock.org/ cease to be
 supported in January 2020]. Stem and Nyx remain compatible with Python 2.x
 and will continue to do so until the PSF drops support.

 ----

 I am **not** suggesting that the site support python 2.x, but I **am**
 suggesting that the site should abort with a useful message saying "python
 2.x is not supported". The code that errors is attempting to support both
 python versions which is why I spent several hours troubleshooting "why is
 our site broken?".

 https://gitweb.torproject.org/project/web/tpo.git/tree/packages/i18n/lektor_i18n.py#n58

 As others contribute to the site folks will run into this problem again
 and again. It would be much better if 'lector server' aborts with a
 message saying 'python 2.x is unsupported' rather than the confusing
 stacktraces it presently omits.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29495#comment:4>
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