New submission from Jean-Paul Calderone <[EMAIL PROTECTED]>: In Python 2.5 and earlier, the `showwarning´ function in the `warnings´ module has this signature:
def showwarning(message, category, filename, lineno, file=None): In trunk (and presumably what will become Python 2.6), this has become: def showwarning(message, category, filename, lineno, file=None, line=None): `showwarning´ is documented as a hook which libraries or applications may override in order to control how warnings are reported. The addition of a new parameter to the function and the change to related code to call it with an argument for that new parameter means that libraries and applications which replaced it will not work without modification on Python 2.6. Instead, a `TypeError´ will be raised when a warning is emitted. I suggest restoring the previous signature for `showwarning´ and adding a new (perhaps preferred) API for showing a warning with the extra information available. It may also make sense to emit a deprecation warning when an overridden old-style `showwarning´ is found. ---------- components: Library (Lib) messages: 65894 nosy: exarkun severity: normal status: open title: incompatible change to warnings.showwarning type: behavior versions: Python 2.6 __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2705> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
