candide wrote: > About the standard function bool(), Python's official documentation > tells us the following : > > bool([x]) > Convert a value to a Boolean, using the standard truth testing procedure. > > In this context, what exactly a "value" is referring to ? > > For instance, > >>> x=42 > >>> bool(x=5) > True > >>>
Cute. What's happening here is that `x=5` isn't really an expression. It's passing a value to the named parameter `x`, specified in the definition of `bool`. Try it with something else: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> bool(y=5) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'y' is an invalid keyword argument for this function Mel. -- http://mail.python.org/mailman/listinfo/python-list