func_code: def swap_unique_keys_values(a):
      lis = ''
      for no in a:
          lis += str(a[no])
      dir = {}
      print(lis)
      for i in a:
          print(lis.count(str(a[no])))
          if str(a[no]).count(lis) < 2:
              dir[a[i]] = i
      return dir