This function takes a list and an element, and returns the smallest index where the element occurs in the list. This function returns None if the element is not in the list.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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def my_index_1(my_list:List[int], my_element:int)->int:
"""Our version of the one-argument version of the index function.

https://docs.python.org/dev/library/stdtypes.html#common-sequence-operations
)
This function takes a list and an element, and returns the smallest
index where the element occurs in the list. This function returns
None if the element is not in the list.

Arguments:
my_list (list): A list of integers.
my_element (int): The element to be found.

Returns:
int: The smallest index at which my_element is found in my_list.

Examples:

>>> print(my_index_1([], 2))
None

>>> print(my_index_1([1, 2, 3], 2))
1

>>> print(my_index_1([3, 1, 2, 3, 1], 2))
2

>>> print(my_index_1([3, 1, 2, 3, 1], 3))
0

"""

 

 

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