1. Intro to Computer Science CS1510 Dr. Sarah Diesburg
Lists and Tuples
Intro to Computer Science
CS1510
Dr. Sarah Diesburg

2. Tuples Tuples are easy: they are simply immutable lists.
They are designated with a comma:
Not the parenthesis!
myTuple = (1,’a’,3.14,True)
newTuple = (,) #Empty tuple
anotherTuple = 2,3 #Tuple without parenthesis

3. The Question is, Why?
The real question is, why have an immutable list, a tuple, as a separate type?
An immutable list gives you a data structure with some integrity, some permanency, if you will.
You know you cannot accidentally change one.

4. Lists and Tuples
Everything that works with a list works with a tuple except methods that modify the list/tuple.
Thus indexing, slicing, len, print all work as expected.
However, none of the mutable methods work: append, extend, remove.

5. Anagram Example with Tuples
Let’s make an anagram program and look at how we can use it with lists and tuples