Matthias Bussonnier added the comment:
> (Optional) Change 'value' to 'exc' in the API to reflect the 3.x restriction
> Keep the synonym until after 2.7.
Do you mean after 2.7 EOL, or after 3.7 ?
> etype: In 3.5+ document that it is an ignored dummy argument and that one can
> just pass 0, '', or None.
> (Optional) Deprecate the parameter and make it optional. This can be
> handled* in the code and would be like range having option 'start'. This is
> messy but would be temporary.
That seem hard to do if we want to allow func(exception), should we attempt to
emit a deprecation warning only when etype is used in the Legacy Form ?
> Remove after 2.7.
Same question as above, unsure what you mean.
> (Optional) Change 'value' to 'exc' in the API to reflect the 3.x restriction.
> Document 'value' as a deprecated synonym for keyword usage.
That seem like overly complicated as now the actual exception object can be
either in etype, value, or exc.
Let my try to give example to see if I understood correctly
2.7 compat
print_exception(etype, value, tb)
print_exception(etype=etype, value=value, tb=tb)
3.5 compat
print_exception(None, value, tb)
print_exception(etype=None, value=value, tb=tb)
3.7
print_exception(value) == print_exception(type(value), value,
value.__traceback__)
print_exception(value, tb=True) == print_exception(type(value), value,
value.__traceback__)
print_exception(value, tb=None) == print_exception(type(value), value,
None)
print_exception(value, tb=False) == print_exception(type(value), value,
None)
print_exception(value, tb=faketb) == print_exception(type(value), value,
faketb)
# tb can be positional
print_exception(value, tb) == print_exception(value, tb=tb)
Signature would thus be:
if first param isinstance BaseException: # 3.7+, prefered form
print_exception(exc, [tb ,] *, [limit, file, chain])
else:
print_exception(etype, value, tb, [limit, file, chain])
# etype being ignored
Should exc be positional only ?
print_exception(exc, /, [tb ,] *, [limit, file, chain])
Should `limit`, `file`, `chain` be allowed to be positional ?
print_exception(exc, [tb , limit, file, chain])
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26389>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
