Determines prime numbers in a list of integers.

determine_primes.py

from math import sqrt


def determine_primes(given_numbers):
    """Determines prime numbers in a list of integers."""  
    primes = []
    for possible_prime in given_numbers:
        is_prime = True
        for num in range(2, int(sqrt(possible_prime)) + 1):
            if possible_prime % num == 0:
                is_prime = False
                break
        if is_prime:
            primes.append(possible_prime)

    return sorted(set(primes))


if __name__ == '__main__':
    numbers = []
    while True:
        try:
            number  = int(input('Enter a number (0 to quit): '))
        except ValueError:
            print('Please, enter a integer number.')
        else:
            if number == 0:
                break
            elif number > 1:
                numbers.append(number)
            else:
                 print('Enter a number > 1.')
                 continue
    primes = determine_primes(numbers)
    print(*primes, sep=', ')