En Sat, 24 Feb 2007 21:29:13 -0300, Charles D Hixson <[EMAIL PROTECTED]> escribió:
> Sorry, the "script" hasn't been written. But Python apparently *won't* > (automatically) do what I want, which is create a class whose > sub-classes automatically have unique class variables of a determined > form such that I can do a hierarchical search through them. (I could > plausibly handle this for the instance case but "class variables are > static", so it looks like I can't do it for class variables in a > straightforward manner. This looks like it's going to demand a factory > method, or some alternate approach. (Not sure yet which I'll choose.) "Class variables are static" until you assign to them a new value, then become instance (normal) attributes. class A: x = 1 a = A() a.x # prints 1 a.x = 100 a.x # prints 100 A.x # still 1 b = A() b.x # still 1 > What I'm looking for is a reasonable way to implement what Marvin Minsky > calls Panologies. These are "objects" (my term) with sufficient local > intelligence to try alternative models of a situation until they find > one that's appropriate. E.g., is this being operated on as a physical > transaction or a social transaction. (Yes, it is physically happening, > and it's taking place in physical space, but different models yield > different analyses of what's happening. Which is appropriate for the > situation currently being evaluated?) You may be interested on Acquisition, a concept from Zope2. Objects not only have behavior by nature (inheritance) but nurture (acquisition). *Where* an object is contained (or, *how* you reach to it), determines its behavior as well as *what* it is. > P.P.S.: This isn't all loss. I'm expecting that eventually I'll start > running into performance problems, and at that point it would be > necessary to start translating into a native-compiler language. Your design seems to be too dynamic to be feasible on a more static language. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
