def __init__(self, app=None, **kwargs):
        self.app = app
        if self.app:
            self.init_app(app, **kwargs)
Convert an arbitrary string to a standard 'extra' name
dataset/ETHPy150Open MichiganLabs/flask-gcm/flask_gcm/__init__.py/GCM.__init__--crossover with--dataset/ETHPy150Open anzev/hedwig/build/pip/pip/_vendor/pkg_resources/__init__.py/safe_extra