[Python-Dev] Let's get rid of unbound methods
Phillip J. Eby
pje at telecommunity.com
Tue Jan 4 19:51:42 CET 2005
At 01:36 PM 1/4/05 -0500, Jim Fulton wrote:
>duck typing?
AKA latent typing or, "if it walks like a duck and quacks like a duck, it
must be a duck." Or, more pythonically:
if hasattr(ob,"quack") and hasattr(ob,"duckwalk"):
# it's a duck
This is as distinct from both 'if isinstance(ob,Duck)' and 'if
implements(ob,IDuck)'. That is, "duck typing" is determining an object's
type by inspection of its method/attribute signature rather than by
explicit relationship to some type object.
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