Give an integer n, find the next prime

primes.py

__author__ = "Alonso Gutierrez"
# Give input integer n, find the next prime
def find_next_prime(n):
    isprime = False
    n += 1
    while (not isprime):
        # print n
        isprime = True
        if n % 2 == 0:
            # print 'n is even'
            isprime = False

        for i in range(3, n/2, 2):
            if n % i == 0:
                # print 'n in for loop'
                isprime = False
        n += 1
    return n-1

# Test cases
print find_next_prime(6)
print find_next_prime(9)
print find_next_prime(15)
print find_next_prime(788)