| f | def sizer(cls): | f | def sizer(cls): | 
            |  |  |  |  | 
            |  | def get_size(self): |  | def get_size(self): | 
            | n | if hasattr(self, '_custom_size'): | n | if hasattr(self, '_size'): | 
            |  | return self._custom_size |  | return self._size | 
            |  |  |  | else: | 
            |  | try: |  | try: | 
            |  | return len(self) |  | return len(self) | 
            |  | except Exception: |  | except TypeError: | 
            |  | pass |  |  | 
            |  | try: |  | try: | 
            |  | return abs(self) |  | return abs(self) | 
            |  | except Exception: |  | except TypeError: | 
            |  | return 0 |  | return 0 | 
            |  |  |  |  | 
            |  | def set_size(self, value): |  | def set_size(self, value): | 
            | n | self._custom_size = value | n | self._size = value | 
            |  |  |  |  | 
            |  | def del_size(self): |  | def del_size(self): | 
            | t | if hasattr(self, '_custom_size'): | t | if hasattr(self, '_size'): | 
            |  | del self._custom_size |  | del self._size | 
            |  | setattr(cls, 'size', property(get_size, set_size, del_size)) |  | setattr(cls, 'size', property(get_size, set_size, del_size)) | 
            |  | return cls |  | return cls |