[Python-Dev] Arbitrary attributes on funcs and methods

[Fredrik Lundh]

Paul Prescod wrote:
>  * I need to associate a Java-style type declaration with a method so
> that it can be recognized based on its type during Java method =
dispatch.

class foo:
    typemap =3D {}
    def myfunc(self):
        pass
    typemap[myfunc] =3D typeinfo

>  * I need to associate a "grammar rule" with a Python method so that =
the
> method is invoked when the parser recognizes a syntactic construct in
> the input data.

class foo:
    rules =3D []
    def myfunc(self):
        pass
    rules.append(pattern, myfunc)

>  * I need to associate an IDL declaration with a method so that a COM
> interface definition can be generated from the source file.

class foo:
    idl =3D {}
    def myfunc(self):
        pass
    idl[myfunc] =3D "declaration"

>  * I need to associate an XPath "pattern string" with a Python method =
so
> that the method can be invoked when a tree walker discovers a =
particular
> pattern in an XML DOM.

class foo:
    xpath =3D []=20
    def myfunc(self):
        pass
    xpath.append("pattern", myfunc)

</F>