What is a classmethod for?

[Frank Tobin]

On Sun, 2 Jun 2002, Dennis Peterson wrote:

> That's nice, but I can't think of a use for it, given that we have
> inheritance and isinstance(). Can anyone enlighten me?

Personally, I like using classmethods as secondary constructors, generally
gones that are able to construct 'from' something.

e.g.:

class HostPortAddress(tuple):
	def from_str(self, s):
		return self(s.split(':', 1))
	from_str = classmethod(from_str)

-- 
Frank Tobin			http://www.neverending.org/~ftobin/