python3.7 installation failing - so why?
pedicularis at mail.com
Sat Feb 23 00:38:11 EST 2019
On Sat, 23 Feb 2019 14:56:03 +1100, Chris Angelico wrote:
> On Sat, Feb 23, 2019 at 2:51 PM Frank Miles <pedicularis at mail.com>
>> I have a Debian/Linux machine that I just upgraded to the newer
>> 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.
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!
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