Introducing a tuple

intro_tuple.py

>>> #The tuple is a common CS structure. 
>>> T = (1,2,3) #think of it as a record 
>>> type(T) 
<class 'tuple'>
#you're not limited to numbers, you can store anything in a tuple, list, set etc.
>>> Friends = ("Bill", "Bob", "Will") 
>>> Friends[0] #access it's first element.
'Bill'
>>> T[2]
3
#tuples are immutable and don't support assignment.
>>> T[1] = 3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment
>>>