find_index_of_element_in_python.md

How to find index of an element in python?

You can find index of an element by using the index() method. That method returns the first occurence of the element in a list. If it doesn't exists returns an error.

Example 1

my_list = ['foo', 'bar', 'nothing', 'something', 'foo']
my_list.index('bar')

• output:

1

Example 2

my_list = ['foo', 'bar', 'nothing', 'something', 'foo']
my_list.index('foo')

• output:

0

Example 3

my_list = ['foo', 'bar', 'nothing', 'something', 'foo']
my_list.index('thing')

• output:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: 'thing' is not in list