On Sat, 23 Feb 2019 02:30:01 +0100, Frank Miles wrote: > I just upgraded my desktop from stable/stretch to testing/buster. > I'd earlier done the same to a laptop without any problems. > On the desktop, I get the following strange traceback : > > $ 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' >>>> >>>> > I've tried reinstalling python3.7 and its library packages without > effect. > > Any hints on how I might find what's causing this pathological behavior? > TIA! > -Frank
I posted a similar query on the python newsgroup - and Chris Angelico provided a good diagnostic method and correctly speculated about the source of the problem. What had happened some time ago was I'd introduced a python3 enum system, which happened to reside at /usr/local/python3.7/dist-packages. This was earlier in the path than the proper enum module, so got imported rather than the one in /usr/lib/python3.7/ . Renaming things to get it out of the way has restored the proper import, allowing python3 to work normally. Thanks all- Frank
