(self, idx)
return len(self[idx])
Returns the size of a given cluster.

        @param idx: the cluster in which we are interested.
Returns the size of a given cluster.
Returns the size of a given cluster .
def size(self, idx):
        """Returns the size of a given cluster.

        @param idx: the cluster in which we are interested.
        """
        return len(self[idx])
def size ( self , idx ) : return len ( self [ idx ] )