On Sat, Feb 23, 2019 at 4:41 PM Frank Miles <pedicula...@mail.com> wrote: > > On Sat, 23 Feb 2019 14:56:03 +1100, Chris Angelico wrote: > > > On Sat, Feb 23, 2019 at 2:51 PM Frank Miles <pedicula...@mail.com> > > wrote: > >> > >> I have a Debian/Linux machine that I just upgraded to the newer > >> "testing" > >> distribution. I'd done that earlier to another machine and all went > >> well. With the latest machine, python2 is OK but python3 can barely > >> run at all. For example: > >> > >> $ python3 Python 3.7.2+ (default, Feb 2 2019, 14:31:48) > >> [GCC 8.2.0] on linux Type "help", "copyright", "credits" or "license" > >> for more information. > >> >>> help() > >> Traceback (most recent call last): > >> File "<stdin>", line 1, in <module> > >> File "/usr/lib/python3.7/_sitebuiltins.py", line 102, in __call__ > >> import pydoc > >> File "/usr/lib/python3.7/pydoc.py", line 66, in <module> > >> import inspect > >> File "/usr/lib/python3.7/inspect.py", line 40, in <module> > >> import linecache > >> File "/usr/lib/python3.7/linecache.py", line 11, in <module> > >> import tokenize > >> File "/usr/lib/python3.7/tokenize.py", line 33, in <module> > >> import re > >> File "/usr/lib/python3.7/re.py", line 143, in <module> > >> class RegexFlag(enum.IntFlag): > >> AttributeError: module 'enum' has no attribute 'IntFlag' > >> >>> > >> >>> > >> Question: how can I determine what has gone wrong? > > > > Hmm. I'd start with: > > > > $ which python3 $ dpkg -S `which python3` > > > > and from inside Python: > >>>> import sys; sys.path import enum; enum.__file__ > > > > My best guess at the moment is that your "enum" package is actually a > > compatibility shim for earlier Python versions, less functional than the > > one provided by Python 3.7. You may need to *uninstall* a shim package. > > But I could well be wrong, and maybe there'd be a clue in your paths. > > > > ChrisA > > Whoopee! You nailed it! > The path included /usr/local/lib/python3.7/dist-packages, which included > an enum file as you suggested. The 'import enum; enum.__file__' (gonna > have to look up that syntax) provided with the path to that directory. > > Many thanks Chris for a most helpful suggestion!
Cool! Glad that's working. There's nothing very special about the syntax per se - it's just looking up an attribute on the 'enum' module. What's special is that every module has an attribute called "__file__" which says which file it was loaded from (if any - there's no "sys.__file__" because the sys module comes from deep inside Python's core). Extremely handy. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
