warn_explicit(message, category, filename, lineno, module, registry)
The regular warn() call calculates a bunch of values and calls
warn_explicit() with these.
This will be used to issue better syntax warnings.
appends to list of filters instead of inserting at the front. This
is useful to add a filter with a lower priority than -W options.
- Cosmetic improvements to a docstring and an error message.
Guido van Rossum
Skip Montanaro
Tim Peters