Path 1: 4 calls (1.0)

1def open(self) -> None:
2        self._dunder_methods = (
3            EXTRA_DUNDER_METHODS
4            + DUNDER_PROPERTIES
5            + self.linter.config.good_dunder_names
6        )
7        for since_vers, dunder_methods in DUNDER_METHODS.items():
8            if since_vers <= self.linter.config.py_version:
9                self._dunder_methods.extend(list(dunder_methods.keys()))