Find the Max value in a Python List without using the max function

my_list = [22, 15, 73, 215, 4, 7350, 113]

max_value = my_list[0]

for val in my_list:
    if val > max_value:
        max_value = val

print(max_value)

def find_max_value(my_list):
    """
    Find the maximum value in a list

    :param my_list: The List of values
    :return: The max item in the list
    """
    if not my_list:
        raise ValueError("List is empty")

    max_value = my_list[0]
    for val in my_list:
        if val > max_value:
            max_value = val
    return max_value


numbers_list = [22, 15, 73, 215, 4, 7350, 113]

print(find_max_value(numbers_list))

import pytest

# Assuming the find_max_value function is stored under app.number_operations
from app.number_operations import find_max_value


@pytest.mark.parametrize(
    "input_list, expected_output",
    [
        ([22, 15, 73, 215, 4, 7350, 113], 7350),
        ([3.14, 2.71, 1.618, 2.71828], 3.14),
        (["apple", "banana", "orange", "kiwi"], "orange"),
        ([], None),
    ],
)
def test_find_max_value(input_list, expected_output):
    """
    Test the find_max_value function across different input lists.

    :param input_list: The input list
    :param expected_output: The expected output of the max value, or an exception for an empty list
    """
    if not input_list:
        with pytest.raises(ValueError):
            find_max_value(input_list)
    else:
        assert find_max_value(input_list) == expected_output

============================= test session starts =============================
collecting ... collected 4 items

test_number_operations.py::test_find_max_value[input_list0-7350] PASSED  [ '25%']
test_number_operations.py::test_find_max_value[input_list1-3.14] PASSED  [ '50%']
test_number_operations.py::test_find_max_value[input_list2-orange] PASSED [ '75%']
test_number_operations.py::test_find_max_value[input_list3-None] PASSED  ['100%']

============================== 4 passed in '0.01s' ==============================