多进程求100000以内质数之和，程序报错

import time
from multiprocessing import Process, Queue

q = Queue()

class AddPrime(Process):
def init(self,start):
super().init()
self.prime = []
self.start = start

def is_prime(self, num):
    if num <= 1:
        return False
    for i in range(2, num // 2 + 1):
        if num % i == 0:
            return False
    return True

def run(self):
    for i in range(self.start, self.start + 25000):
        if self.is_prime(i):
            self.prime.append(i)
    n = sum(self.prime)
    q.put(n)

if name == 'main':
begin = time.time()
jobs = []
for i in [1, 25001, 50001, 75001]:
p = AddPrime(i)
jobs.append(p)
p.start()
[i.join() for i in jobs]
while not q.empty():
result += q.get()
print(result)
print("用时:",time.time() - begin)

你定义的类属性start和Process自己的类方法start()重名了，所以进程启动不了，建议把类属性改名