Finds the nth prime number.

nthprime.py

primes = []
x = 2
nthprime = 1000 # set to 1000 to get the 1000th prime number
while len(primes) < nthprime:
    isPrime = True
    for item in primes:
        if item > x**.5:
            break
        if x % item == 0:
            isPrime = False
            break
    if(isPrime):
        primes.append(x)
    x += 1

print primes[nthprime-1]