====== tuples ======

Store multiple items in a single variable.
Tuple:
  * ordered (has index)
  * allow duplicated (index is unique)
  * immutable
  * can contain different data types

<code python>
# create tuple
a = ( 1, "a", True )

# create tuple with one item NOTE: comma after item
a = ( 1, )
</code>

===== "Change" items in tuple =====

Tuples are immutable. Only way is to create new tuple using temporary list.

<code python>
t = ('a', 'b', 'c')
t_new = t + ('d', 'e', 'f')

l = list(t)

l.insert('d', 'e', 'f')
l[1] = 'bb'
l.remove(0)

t_new = tuple(l)
</code>