# lists are mutable
list_one = ['REMOVE', 'RANDOM']
list_two = [200, -2, [1.0, 0.0]]
list_one[0] = 'ADD' # ['ADD', 'RANDOM']
list_one[1] # RANDOM
len(list_one) # 2
len(list_two) # 3
# concatenate lists
list = list_one + list_two # ['ADD', 'RANDOM', 200, -2, [1.0, 0.0]]
# list operations
list.append('NULL') # ['ADD', 'RANDOM', 200, -2, [1.0, 0.0], 'NULL']
list.sort() # [-2, 200, [1.0, 0.0], 'ADD', 'NULL', 'RANDOM']
# create list from a string
list_string = list('100B') # ['1', '0', '0', 'B']