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.
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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