def enter_context(self, cm):
        # We look up the special methods on the type to match the with statement
        _cm_type = type(cm)
        _exit = _cm_type.__exit__
        result = _cm_type.__enter__(cm)
        self._push_cm_exit(cm, _exit)
        return result
Enters the supplied context manager
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/contextlib.py/ExitStack.enter_context