How to get the Index of Specified Element in a List in Python

How to get the Index of Specified Element in a List in Python ?

To find the index of a specified element in a list in Python, you can use the index method of the list class.

In this example,

We create a list named my_list with some elements.
We use the index method of the list object my_list to find the index of a specific element.
The index method returns the index of the first occurrence of the element in the list, or raises a ValueError if the element is not found.
Finally, we print the index to standard output.

my_list = [10, 20, 30, 40, 50]
index = my_list.index(40)
print(f'Index of element is: {index}')

Index of element is: 3

In this example,

We create a list named my_list with some string elements.
We use the index method of the list object my_list to find the index of a specific string.
The index method returns the index of the first occurrence of the string in the list, or raises a ValueError if the string is not found.
Finally, we print the index to standard output.

my_list = ['apple', 'banana', 'cherry', 'date', 'elderberry']
index = my_list.index('cherry')
print(f'Index of element is: {index}')

Index of element is: 2

In this tutorial, we learned How to get the Index of Specified Element in a List in Python language with well detailed examples.