checking if a list is empty

[rusi]

On May 14, 12:39 pm, Steven D'Aprano <steve
+comp.lang.pyt... at pearwood.info> wrote:
> On Thu, 12 May 2011 23:46:12 -0700, rusi wrote:
> > Mathematics has existed for millenia. Hindu-arabic numerals (base-10
> > numbers) have been known for about one millennium
> > The boolean domain is only a 100 years old. Unsurprisingly it is not
> > quite 'first-class' yet: See
> >http://www.cs.utexas.edu/users/EWD/transcriptions/EWD10xx/EWD1070.html
> > [Lifted fromhttp://c2.com/cgi/wiki?EqualVsTrueFalse]
>
> Th money-quote as regards using arbitrary objects in truth tests:
>
>     [quote]
>     All this changed with the introduction of the two-element
>     boolean domain {true, false} which provides the vocabulary
>     needed to assign values to boolean expressions: 3<4 is a
>     way for writing true, 3>4 is a way for writing false,
>     whereas the value of x>0 depends on the value of x ...
>     [end quote]
>
> In Python, [1, 2, 3] is another way of writing true, and [] is another
> way of writing false. Similarly with any other arbitrary objects.

Well so is [1,2] another way of writing True

And then we get the interesting result that
(True = True) is False