The index() method is a built-in function in Python that returns the index of a specified element in a tuple. It searches for the specified element starting from the beginning of the tuple and returns the index of the first occurrence of the element. If the element is not found, it raises a ValueError.
Parameter Values
| Parameter | Description |
|---|---|
| value | The value to search for in the tuple. |
| start | The index at which to start the search. |
| stop | The index at which to end the search. |
Return Values
The index() method returns an int which is the index of the first occurrence of the value.
How to Use index() in Python
Example 1:
The index() method returns the index of the specified element in a tuple.
tuple1 = (10, 20, 30, 40, 50)
print(tuple1.index(30))
Example 2:
If the element is not found in the tuple, a ValueError is raised.
tuple2 = ('a', 'b', 'c')
try:
print(tuple2.index('d'))
except ValueError as e:
print('Element not found in the tuple')
Example 3:
The index() method can also take optional arguments to specify the start and end index for the search.
tuple3 = (7, 8, 9, 8, 10)
print(tuple3.index(8, 1, 4) # Output: 1