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def main():                                                                                                                                                                       
  o = open ('data.txt')                                                                                                                                                           
  his = []                                                                                                                                                                        
  lows = []                                                                                                                                                                       
  for i in o:                                                                                                                                                                     
    [hi,low] = i.split()                                                                                                                                                          
    his.append(hi)                                                                                                                                                                
    lows.append(low)                                                                                                                                                              
  # convert to integer type                                                                                                                                                       
  his  = [int(x) for x in his]                                                                                                                                                    
  lows = [int(x) for x in lows]                                                                                                                                                   
  avg = λ x : sum(x) / len(x)                                                                                                                                                     
  print ("avg hi", avg(his))                                                                                                                                                      
  print ("avg low", avg(lows))                                                                                                                                                    
                                                                                                                                                                                  
                                                                                                                                                                                  
if __name__ == '__main__':                                                                                                                                                        
    main()