create a function of a set of integers and a value for which you need to find the nearest one.

def find_nearest_number(numbers, target):
    numbers.sort()
    nearest_number = None
    smallest_difference = None
    for number in numbers:
        difference = abs(number - target)
        if not nearest_number or difference < smallest_difference:
            nearest_number = number
            smallest_difference = difference
    return nearest_number

numbers = [1, 3, 5, 7]
print(find_nearest_number(numbers, 4))