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# import_with_metaclass.py
import inspect, types
def import_with_metaclass(metaclass, modname):
"Module importer substituting custom metaclass"
dct = {'__module__' : modname}
mod = __import__(modname)
for key, val in mod.__dict__.items():
if inspect.isclass(val):
if isinstance(val, types.ClassType):
bases = (val, object) # convert old-style to new-style
else:
bases = (val,)
setattr(mod, key, metaclass(key, bases, dct))
return mod
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