1. Definition
A tuple is an immutable list. A tuple can not be changed in any way once it is created
>>> TupTest=("Value1","Value2","Value3")
>>> TupTest
('Value1', 'Value2', 'Value3')
>>> TupTest[0]
'Value1'
>>> TupTest[2]
'Value3'
Note:
1)It is include by"()"
2)Cannot be changed after it is defined
3)No method(like remove,append,index etc.)