text: import unitconv as uc
  valor = uc.conversion(4, "mm", "cm", "leng",4)
  print(valor)
  
  
  lista = [2,3,4,5,6,98]
  for i in range(0,len(lista)):
      valor = uc.conversion(lista[i], "m2", "plg2", "area",4)
      print(valor)
  
  print(uc.open_json("leng").keys())