docs: def compar(self, x, y):
          '''
          simple comparator method
  
          '''
  
          indX=0
          indY=0
  
          a= int(x[0].split('-')[1])
  
          b= int(y[0].split('-')[1])
  
  
          if a>b:
              return 1
          if a==b:
              return 0
          if a<b:
              return -1