code: def score(*args):
  		
  		self = args[0]
  
  		if len(args) ==1:
  			return self.qs_
  		else:
  			G = args[1]
  			c = args[2]
  			x = args[3]
  			return self._score(G, c, x)
docs: Get score of core-periphery pairs.
  		
  		Parameters
  		----------
  		G : Graph object. 
  		c : Dict object,  the keys and values of which are the name of node and its ID of belonging core-periphery pair.  
  		
  		
  		Returns
  		-------
  		q : List. q[i] is the quality of core-periphery pair i.