def __missing__(self, key):
        if key not in self.functions:
            raise KeyError
        return self.run_key(key)
Add/remove the given entries from sys.path.
dataset/ETHPy150Open saltstack/salt/salt/client/__init__.py/FunctionWrapper.__missing__--crossover with--dataset/ETHPy150Open enthought/envisage/envisage/package_plugin_manager.py/PackagePluginManager._update_sys_dot_path