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Listas
Los listas son muy similares a los arrays. Pueden contener cualquier tipo de variable, y pueden contener tantas variables como desees. Las listas también se pueden iterar de una manera muy simple. Aquí hay un ejemplo de cómo construir una lista.
mylist = []
mylist.append(1)
mylist.append(2)
mylist.append(3)
print(mylist[0]) # prints 1
print(mylist[1]) # prints 2
print(mylist[2]) # prints 3
# prints out 1,2,3
for x in mylist:
print(x)
Acceder a un índice que no existe genera una excepción (un error).
mylist = [1,2,3]
print(mylist[10])
Exercise
En este ejercicio, necesitarás agregar números y cadenas a las listas correctas usando el método "append" de listas. Debes agregar los números 1, 2 y 3 a la lista "numbers", y las palabras 'hello' y 'world' a la variable strings.
También tendrás que completar la variable second_name con el segundo nombre en la lista names, usando el operador de corchetes []. Ten en cuenta que el índice es basado en cero, por lo que si quieres acceder al segundo elemento en la lista, su índice será 1.
numbers = []
strings = []
names = ["John", "Eric", "Jessica"]
# write your code here
second_name = None
# this code should write out the filled arrays and the second name in the names list (Eric).
print(numbers)
print(strings)
print("The second name on the names list is %s" % second_name)
numbers = []
strings = []
names = ["John", "Eric", "Jessica"]
# write your code here
numbers.append(1)
numbers.append(2)
numbers.append(3)
strings.append("hello")
strings.append("world")
second_name = names[1]
# this code should write out the filled arrays and the second name in the names list (Eric).
print(numbers)
print(strings)
print("The second name on the names list is %s" % second_name)
test_output_contains("[1,2,3]", no_output_msg= "Make sure that you have printed the `numbers` list.")
test_output_contains("['hello', 'world']", no_output_msg= "Make sure that you have printed the `strings` list.")
test_output_contains("The second name on the names list is Eric", no_output_msg= "Did you fill in the variable `second_name` with the second name in the names list?")
success_msg("Great Job!")
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