primes_count.py

n = 100
primes = [i for i in range(2, n)]
for i, j in enumerate(primes):
    for k in range(i + 1, len(primes)):
        if primes[k] != None and j != None:
            if primes[k] % j == 0:
                primes[k] = None
primes = [x for x in primes if x is not None]
print(primes)
print(len(primes))