On 12Nov2022 10:34, Ian Pilcher <arequip...@gmail.com> wrote:
So I've done this.
class _HasUnboundClassMethod(object):
@classmethod
def _classmethod(cls):
pass # pragma: no cover
_methods = [ _classmethod ]
_ClassMethodType = type(_HasUnboundClassMethod._methods[0])
Which allows me to do this:
def __init__(self, d):
for attr, factory in self._attrs.items():
if callable(factory):
value = factory(d[attr])
else:
assert type(factory) is self._ClassMethodType
value = factory.__func__(type(self), d[attr])
setattr(self, attr, value)
It's a bit cleaner, although I'm not thrilled about having a throwaway
class, just to define a literal that ought to be provided by the
runtime.
Ah, nice again.
You shouldn't need a throwaway class, just use the name "classmethod"
directly - it's the type!
if not callable(factory):
if type(factory) is classmethod:
# replace fctory with a function calling factory.__func__
factory = lambda arg: factory.__func__(classmethod, arg)
else:
raise TypeError("unhandled factory type %s:%r" % (type(factory),
factory)
value = factory(d[attr])
Cheers,
Cameron Simpson <c...@cskk.id.au>
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