chatExcel

# Metaclass for mixing slots and descriptors # From "Programming in Python 3" by Mark Summerfield Ch.8 p. 383 class AutoSlotProperties(type): def __new__(mcl, classname, bases, dictionary): slots = list(dictionary.get("__slots__", [])) for getter_name in [key for key in dictionary if key.startswith("get_")]: name = getter_name slots.append("__" + name) getter = dictionary.pop(getter_name) setter = dictionary.get(setter_name, None) if (setter is not None and isinstance(setter, collections.Callable)): del dictionary[setter_name] dictionary[name] = property(getter. setter) dictionary["__slots__"] = tuple(slots) return super().__new__(mcl, classname, bases, dictionary)