code: def read_file(fname):
      
      print("NO - dont use this function read_file(fname):")
      exit(1)
      lst = []
      with open(fname, 'r') as f:
          #hdr = f.readline()
          for line in f:
              lst.append(line.strip('\n'))
      return lst
docs: read a CSV file (ref_classes.csv) and return the 
      list of names