Curious relation

[Greg J]

On Apr 24, 12:08 am, Dan Bishop <danb... at yahoo.com> wrote:
> On Apr 23, 11:51 pm, Greg J <greg.ja... at gmail.com> wrote:
>
> >  I was reading the programming Reddit tonight and came across this
> > (http://reddit.com/info/6gwk1/comments/):
>
> > >>> ([1]>2)==True
> > True
> > >>> [1]>(2==True)
> > True
> > >>> [1]>2==True
>
> > False
>
> > Odd, no?
>
> > So, can anyone here shed light on this one?
>
> A long time ago, it wasn't possible for comparison operators to raise
> exceptions, so it was arbitrarily decided that numbers are less than
> strings.  Thus, [1]>2 and [1]>False.  This explains your first two
> examples.

Sure, those I understood.

> For the third, remember that the comparison operators are chained, so
> a>b==c means (a>b) and (b==c).  Since 2==True is false, so is the
> entire expression.

Ach! Of course. For some reason I was blanking on the chained nature
of relational operators in Python.

Thanks for the reminder!
>
> In Python 3.0, all three of these expressions will raise a TypeError.