(self, dist)
return self.by_key.get(dist.key) == dist
True if `dist` is the active distribution for its project
True if `dist` is the active distribution for its project
True if dist is the active distribution for its project
def __contains__(self, dist):
        """True if `dist` is the active distribution for its project"""
        return self.by_key.get(dist.key) == dist
def __contains__ ( self , dist ) : return self . by_key . get ( dist . key ) == dist