Example for using main() and if __name__ check

main.py

def divisors(n):
    result = []
    
    start = 1

    while start < n:
        if n % start == 0:
            result = result + [start]
        start += 1

    return result

def main():
    n = input("Enter n: ")
    n = int(n)

    print(divisors(n))

if __name__ == "__main__":
    main()