def build_mypy_cmdline(self, filename: str, mypy_config: Optional[str]) -> List[str]:
    if mypy_config:
        return [('--config-file=' + mypy_config), filename]
    return (DEFAULT_ARGUMENTS + [filename])
def build_mypy_cmdline(self, filename: str, mypy_config: Optional[str]) -> List[str]:
    if mypy_config:
        return [('--config-file=' + mypy_config), filename]
    return (DEFAULT_ARGUMENTS + [filename])