>>> 0 or None is None True >>> None or 0 is None False >>> None or 0 is 0 True
Yes, this is explained in the docs: The expression x or y first evaluates x; if x is true, its value is returned; otherwise, y is evaluated and the resulting value is returned. Another one (also explainable): >>> 0 or None == None or 0 True # Above is same as (operator precedence): >>> 0 or (None == None) or 0 True # Here is something different: >>> (0 or None) == (None or 0) False -- http://mail.python.org/mailman/listinfo/python-list
