[tor-bugs] #30847 [Core Tor/Stem]: Failed unit tests with Python 3.8

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#30847: Failed unit tests with Python 3.8
----------------------+-------------------------------
 Reporter:  miceliux  |          Owner:  atagar
     Type:  defect    |         Status:  new
 Priority:  Medium    |      Component:  Core Tor/Stem
  Version:            |       Severity:  Normal
 Keywords:            |  Actual Points:
Parent ID:            |         Points:
 Reviewer:            |        Sponsor:
----------------------+-------------------------------
 There are some errors when running unit tests on Python 3.8:

 + /usr/bin/python3 run_tests.py --unit
 ======================================================================
                              INITIALISING
 ======================================================================
   stem version...                                      1.7.1
   python version...                                    3.8.0a4
   operating system version...                          failed
 module 'platform' has no attribute 'linux_distribution'
 BUILDSTDERR: /builddir/build/BUILD/stem-1.7.1/test/output.py:150:
 SyntaxWarning: invalid escape sequence \(
 BUILDSTDERR:   m = re.match('.*( \(test\..*?\)).*', line_content)
 BUILDSTDERR: /builddir/build/BUILD/stem-1.7.1/test/output.py:163:
 SyntaxWarning: invalid escape sequence \.
 BUILDSTDERR:   m = re.search('(test\.[^)]*)', line_content)
 BUILDSTDERR: /builddir/build/BUILD/stem-1.7.1/test/output.py:264:
 SyntaxWarning: invalid escape sequence \(
 BUILDSTDERR:   module_match = re.match('.*\((test\.\S+)\.\S+\).*',
 line_content)
 BUILDSTDERR: /builddir/build/BUILD/stem-1.7.1/test/task.py:140:
 SyntaxWarning: invalid escape sequence \S
 BUILDSTDERR:   test_match = re.search('^class
 (\S*)\(unittest.TestCase\):$', file_contents, re.MULTILINE)
 BUILDSTDERR: /usr/lib/python3.8/site-packages/pep8.py:110: FutureWarning:
 Possible nested set at position 1
 BUILDSTDERR:   EXTRANEOUS_WHITESPACE_REGEX = re.compile(r'[[({] |
 []}),;:]')

 Full log here:

 https://copr-be.cloud.fedoraproject.org/results/@python/python3.8/fedora-
 rawhide-x86_64/00917176-python-stem/build.log.gz

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30847>
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