Linear search in Python

linear_search.py

number_list = [10, 14, 19, 26, 27, 31, 33, 35, 42, 44]
target_number = 33


def linear_search(search_list, target_value):
    for idx in range(len(search_list)):
        if search_list[idx] == target_value:
            return idx
    raise ValueError("{0} not in list".format(target_value))


try:
    # Call the function below...
    result = linear_search(number_list, target_number)
    print("Linear search:", result)
except ValueError as error_message:
    print("{0}".format(error_message))