求1到1000的完美数，用Python生成代码

下面是Python代码：

def is_perfect(num):
    factors = []
    for i in range(1, num):
        if num % i == 0:
            factors.append(i)
    return sum(factors) == num

perfect_numbers = []
for i in range(1, 1000):
    if is_perfect(i):
        perfect_numbers.append(i)
        
print(perfect_numbers)