[tor-bugs] #33158 [Metrics/Consensus Health]: Make DocTor Python 3 compatible

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#33158: Make DocTor Python 3 compatible
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     Reporter:  gk                        |      Owner:  tom
         Type:  task                      |     Status:  new
     Priority:  Medium                    |  Milestone:
    Component:  Metrics/Consensus Health  |    Version:
     Severity:  Normal                    |   Keywords:  network-health
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 DocTor depends on Stem which recently dropped Python 2 support. We should
 go over all the DocTor scripts and make sure they work under a Python 3
 paradigm. I'll file a separate ticket for the actual migration on
 carinatum once we are done here.

 (Metrics folks: I'll keep the same component as for #33067 which is only
 temporary until we finally moved to Gitlab. Sorry for the noise but I
 don't want to migrate to Github first to do another migration later on and
 I don't want to re-open Core Tor/DocTor with all that it entails. I
 currently don't envision more doctor tickets until we move to Gitlab than
 the two, so the noise is hopefully okay-ish.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33158>
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