Hg with Python 3 and Re2

[Charles Chamberlain]

Hello,

I'm trying to run mercurial with Python3 and re2. Installing re2 with pip3
succeeds,
but then any attempt to import it fails with the following:

    File "mercurial/util.py", line 1925, in <module>
      import re2
    File "re2.pyx", line 1, in init re2 (src/re2.cpp:13681)
    NameError: basestring

There is a stack overflow question
<https://stackoverflow.com/questions/46792200/using-re2-in-python3> from 3
years ago that suggests it's not compatible.
Has anyone succeeded in running mercurial with python3 and re2?

Thanks very much!
Charles
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