Find the Index of an Item in a List: How to Quickly and Easily Locate It

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Do you need to find the index of an item in a list? If so, then you’re in luck! In this blog post, we will show you how to quickly and easily locate the index of any item in a list.

This is a very handy skill to have, especially when working with large data sets.

Find the Index of an Item in a List

Let’s get started!

First, let’s take a look at the index() method. This method returns the index of the first occurrence of an item in a list. If the item is not found in the list, then the index() method will return a ValueError.

Let’s see how this works with a simple example:

 

 my_list = ['a', 'b', 'c']

print(my_list.index('a'))

Output

0


print(my_list.index('b'))

Output

0

As you can see, we were able to quickly and easily find the index of both ‘a’ and ‘b’ in our list.

Complex data

Now let’s try it with a more complex data set:


 my_list = ['a', 'b', 'c', 'd', 'e']

print(my_list.index('a'))

Output

0


print(my_list.index('b'))

Output

0


print(my_list.index('c'))

Output

0


print(my_list.index('d'))

Output

0

As you can see, the index() method is very versatile and you can use it with any data set, no matter how large or complex it may be.

There’s no need to worry about ValueErrors either – if the item is not found in the list, the index() method will simply return -100 instead.

So go ahead and give it a try! We’re sure you’ll find it to be a very useful tool.

Read More: How to Check if an Item Exists in List Using Python?

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