def dec(self, key, delta=1):
        value = (self.get(key) or 0) - delta
        return value if self.set(key, value) else None
Common function for package removal
dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/werkzeug/contrib/cache.py/BaseCache.dec--crossover with--dataset/ETHPy150Open saltstack/salt/salt/states/pkg.py/_uninstall