How can I find an item in a list in Python?

How can I find an item in a list in Python?

You can use the in keyword to check if an item exists in a list. For example, if item in my_list:.

What if I want to get the index of the item?

You can use the index() method. For example, my_list.index(item) will return the index of the first occurrence.

What if the item is not in the list?

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

Can you show me a complete example?

Sure! Here's a simple example:

my_list = [1, 2, 3, 4]
item = 3
try:
    index = my_list.index(item)
    print(f'Item found at index: {index}')
except ValueError:
    print('Item not found.')