Removing Elements From A List Of A List

I have the data below, which is a list of lists. I would like to remove the last two elements from each list, leaving only the first three elements. I have tried list.append(), l

Solution 1:

You could use a list comprehension and create a new list of lists with 2 elements removed from each sublist

data = [x[:-2] for x in data]

Solution 2:

As @christian says, you have a list of tuple, as opposed to list. The distinction is significant here as tuple is immutable. You can convert to list of list like this

data = map(list, data)

Now you can mutate each item as you iterate over it

foritemindata:
     delitem[-2:]

In your case the list comprehension is better because it works on your list of tuple equally well.