Python tuples is a sequence data type, similiar to list and string.

>>> x = (6,9,"website","xyz",[1,2,3])
>>> x[2]

'website'

>>> x

(6,9,'website','xyz',[1,2,3])

>>> y = (x,2,3)
>>> y

((6,9,'website','xyz',[1,2,3]),2,3)

>>> len(x)

5

>>> len(y) #x is an element of y

3

>>> a,b,c = y
>>> a

(6,9,'website','xyz',[1,2,3])

>>> b

2

>>> c

3

>>> x[2] = 5

Traceback (most recent call last):
File "", line 1, in 
TypeError: 'tuple' object does not support item assignment