Browse 2D list in Python

Question

I have the code below and I want to go through and display item by item from that list. However, I cannot do this because the entire list is displayed. I ask for your help.

lista = [[10,20,30,40],[50,60,70,80]]
i = 0
for i in range(2):
    print (lista[i])

Answer 1

Cycle is inside the other (nested):

for sublista in lista:
    for item in sublista:
        print item

Or if you don’t need to do anything to the sublists you can just make the list flat:

 print '\n'.join(str(item) for sub in lista for item in sub) 

Answer 2

You can display all items of a sublist in a single row, i.e., use a row to display all items of a sublist. For this you can use the following algorithm...

lista = [[10, 20, 30, 40], [50, 60, 70, 80]]

cont = 0
for sublista in lista:
    cont += 1
    print(f'\033[32mOs elementos da {cont}ª sublista são: ')
    for item in sublista:
        print(item, end='')
        print(', ' if item < sublista[-1] else '.', end='')
    print()

See how the algorithm works on repl it..