Hi fellows,
Does anyone know a way to write virtual methods (in one virtual class)
that will raise an exception only if called without being overridden ?
Currently in the virtual method I'm checking that the class of the
instance calling the method has defined that method as well.
Example:
class Stream(object):
"""Interface of all stream objects"""
def resetStats(self):
"""Reset the stream statistics. All values a zeroed except the
date."""
_log.info('Reset statistics of %s' % self)
if self.__class__.resetStats == Stream.resetStats:
raise NotImplementedError()
It works but it's tedious, I have to add these 2 lines to every virtual
method, changing the content of the 2 lines.
Maybe there is a nice/builtin way to do so (python 2.4)
JM
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