在线程中运行Class方法(python)

Question

我目前正在学习Python和Classes,我有一个基本的问题,但我没有找到任何答案.假设我有这个虚拟课程

class DomainOperations:
    def __init__(self, domain):
        self.domain = domain
        self.domain_ip = ''
        self.website_thumbnail = ''

    def resolve_domain(self):
        #resolve domain to ipv4 and save to self.domain_ip

    def generate_website_thumbnail(self):
        #generate website thumbnail and save the url to self.website_thumbnail

我想同时运行resolve_domain和generate_website_thumbnail,当线程完成时,我想打印IP和缩略图.

编辑:我知道我应该使用线程,也许是这样的

r = DomainOperations('google.com')

t1 = threading.Thread(target=r.resolve_domain)
t1.start()

t2 = threading.Thread(target=r.generate_website_thumbnail)
t2.start()

但是我应该在课外使用它们吗？我应该写另一个类来处理线程吗？

这样做的正确方法是什么？

Answer 1

如果你从课堂上打电话给他们,就像这样简单:

import threading

class DomainOperations:

    def __init__(self):
        self.domain_ip = ''
        self.website_thumbnail = ''

    def resolve_domain(self):
        self.domain_ip = 'foo'

    def generate_website_thumbnail(self):
        self.website_thumbnail= 'bar'

    def run(self):
        t1 = threading.Thread(target=self.resolve_domain)
        t2 = threading.Thread(target=self.generate_website_thumbnail)
        t1.start()
        t2.start()
        t1.join()
        t2.join()
        print(self.domain_ip, self.website_thumbnail)

if __name__ == '__main__':
    d = DomainOperations()
    d.run()

Answer 2

您可以在DomainOperation中继承Thread类，这样代码会更加干净且易于理解。你必须重写run()方法。

from threading import Thread

class DomainOperations(Thread):
    def __init__(self, *args, **kwargs):
       super().__init__(*args, **kwargs)
       self.domain_ip = ''
       self.website_thumbnail = ''

   def resolve_domain(self):
       self.domain_ip = 'foo'

   def generate_website_thumbnail(self):
       self.website_thumbnail= 'bar'

   def run(self):
       #domain will be resolved on first thread
       self.resolve_domain()
       #thumbnail will be resolved on second OR newly created below thread
       thread2 = Thread(target=self.generate_website_thumbnail)
       thread.start()
       # thread1 will wait for thread2
       self.join()
       # thread2 will wait for thread1, if it's late.
       thread2.join()
       # here it will print ip and thumbnail before exiting first thread
       print(self.domain_ip, self.website_thumbnail)

您将以这种方式启动您的线程。

if __name__ == '__main__':
   thread1 = DomainOperations()
   thread1.start()