Vikas BN <vikas...@gmail.com> writes: [...]
> Anyone else encountered this or even have any insights regarding > this behaviour? I'm using Python2.7.2 on Linux > if that matters. ElementTree's `Element` objects behave this way. The "booleanness" is not conformant to the rest of Python. I don't know if or when it's been fixed but here's how to do it. http://effbot.org/zone/element.htm#truth-testing The method you need to work with is `__nonzero__`[1] if you want `bool` to work with your classes. With Python 2.7.2, The `Element` class defined in /usr/lib/python2.7/xml/etree/ElementTree.py has def __nonzero__(self): warnings.warn( "The behavior of this method will change in future versions. " "Use specific 'len(elem)' or 'elem is not None' test instead.", FutureWarning, stacklevel=2 ) return len(self._children) != 0 # emulate old behaviour, for now So, it will evaluate to False only if the number of children is zero. Annoying but when I stumbled on this, it did make me aware of how consistent Python libraries generally are so that this stuck out. [...] Footnotes: [1] http://docs.python.org/reference/datamodel.html#object.__nonzero__ -- ~noufal http://nibrahim.net.in I am a deeply superficial person. -Andy Warhol _______________________________________________ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers