Run Class methods in threads (python)

Question

I'm currently learning Python and Classes and I have a basic question, but I didn't find any answer to it. Let's say I have this dummy class

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 

I want to run simultaneously resolve_domain and generate_website_thumbnail and when the threads are finished I want to print the IP and the thumbnail.

EDIT: I know I should use threads, maybe something like this

r = DomainOperations('google.com')  t1 = threading.Thread(target=r.resolve_domain) t1.start()  t2 = threading.Thread(target=r.generate_website_thumbnail) t2.start() 

But should I use them outside the Class? Should I write another Class to handle Threads?

What is the right way to do that?

Answer 1

If you call them from the class, it is as simple as:

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

You can inherit Thread class in DomainOperation, in this way code would be more clean and easily understandable. you have to override a run() method.

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) 

And you will start your threads in this way.

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