operator overloading

[Thomas Wouters]

On Mon, Jun 05, 2000 at 03:02:47PM -0700, Ken Seehof wrote:

> The following more closely conforms to these conventions:

The return code of __cmp__ is hardly a convention! If you dont return one of
those values, in a consistent manner, you're going to confuse the users of
your class greatly. And possibly break things like list.sort()'s default
sort function.

> ...  def __cmp__(self,other):
> ...   if self.a == other.a:
> ...    return 0
> ...   elif self.a < other.a:
> ...    return -1
> ...   else:
> ...    return 1

Good example not withstanding, you can of course write this much shorter,
and more obvious, and less errorprone:

def __cmp__(self, other):
	return cmp(self.a, other.a)

This will even work if __cmp__ would be changed to return different values
;)

-- 
Thomas Wouters <thomas at xs4all.net>

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