How do I find the index of an item in a Python list?

How do I find the index of an item in a Python list?

You can use the index() method to find the index of an item in a list. For example, my_list.index('item').

What if the item is not in the list?

If the item is not in the list, calling index() will raise a ValueError. You can handle this with a try-except block.

Can you show me an example?

Sure! Here's an example:

my_list = [1, 2, 3, 4]
try:
    index = my_list.index(5)
except ValueError:
    index = 'Item not found'
print(index)

Thanks! What about finding the last index of an item?

You can use the rindex() method in Python 2, or you can reverse the list and use index() in Python 3.