index¶
Description¶
Returns the index of the first occurrence of the specified list item.
Syntax¶
list. index(item)
- item
- Required. Any valid type. ValueError is raised if item is not in the list.
Return Value¶
int
Time Complexity¶
O(1)
Example¶
>>> [1, 2, 3].index(2)
1
>>> [1, 2, 3].index('foo')
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
ValueError: 'foo' is not in list