python编写程序问题

Question

python编写程序，把1000以内的所有素数写入到prime.txt 文件中

Answer 1

def prime(x):
    for i in range(2,x):
        if x%i==0:
            return False
    return True
with open('prime.txt','w') as f:
    for i in range(2,1001):
        if prime(i):
            f.write(str(i)+' ')