loop through list or double loop

[nilamo]

It's not clear what you're trying to do. Could you show some code, along with what the output is vs your expected output?

If it's just iterating over a list of lists, then a for loop works fine:

>>> fruit = ["spam", "eggs", "ham"]
>>> veggies = ["gross", "green", "not-chocolate"]
>>> consumables = [fruit, veggies]
>>> for sublist in consumables:
...   for item in sublist:
...     print(item)
...
spam
eggs
ham
gross
green
not-chocolate