class Editable:
    def make_copy(self):
        # makes an internal copy of self
        # delete old copy
        if hasattr(self, "_copy"):
            if self._copy is not None:
                self._copy = None
        
        # make new copy
        self._copy = JSON.parse(JSON.stringify(self))
    
    def copy(self):
        # return internal copy of self
        # check if even initialized
        if hasattr(self, "_copy"):
            return self._copy
        else:
            return None
    
    def overwrite_with_copy(self):
        for key, value in dict(self._copy).items():
            if key == "_copy":
                continue
            setattr(self, key, value)
            
        self._copy = None