What values are considered false?

[Andrew Dalke]

Harvey Thomas:
> The empty function is not only false, it is also None
>
> In the interpreter,
>
> def foo():pass
>
> foo() is None
>
> 1

Not quite.  You called the fuction 'foo', which doesn't
define a return value so the value None is used instead.
To compare the function to None, do

  foo is None

and you'll get 0.

                    Andrew
                    dalke at dalkescientific.com