List methods

Lists have methods to add, remove and arrange items:

fruits = ["mango", "apple"]
fruits.append("banana")     # add at the end   → ['mango', 'apple', 'banana']
fruits.insert(0, "kiwi")    # add at index 0   → ['kiwi', 'mango', 'apple', 'banana']
fruits.remove("apple")      # remove by value  → ['kiwi', 'mango', 'banana']
last = fruits.pop()         # remove the last item and give it back → 'banana'
fruits.sort()               # sort A→Z (or small→big for numbers)
fruits.reverse()            # reverse the order
print(fruits.index("kiwi")) # position of an item

Start with an empty list and fill it in a loop. This pattern is everywhere:

squares = []
for i in range(1, 4):
    squares.append(i * i)
print(squares)    # [1, 4, 9]