lists retain their original order
list[0] == first element
list[-1] == last element
negative indices return elements from end of list
list[:] == list[:n] + list[n:] == make a complete copy of a list
list[0] == first element
list[-1] == last element
negative indices return elements from end of list
list[:] == list[:n] + list[n:] == make a complete copy of a list
newDict = oldDict.copy() #= list[:] for dictionaries