[Python] Need Multiprocessing God To Help Me (Advice, Template, Code, anything)

url_index = 0
class myThread(threading.Thread):
    def __init__(self, thread_n, name):
         threading.Thread.__init__(self)
         self.name = name
         self.thread_n = thread_n
    def run(self):
         do_something(self.thread_n, self.name)
         
    def do_somthing(self, thread_n, threadname):
         global url_index
         scrape what you want
         url_index+=1
        
thread1 = myThread(1, "Thread-1", 1)
thread2 = myThread(2, "Thread-2", 1)
thread3 = myThread(3, "Thread-3", 1)

thread1.start()
thread2.start()
thread3.start()
thread1.join()
thread2.join()
thread3.join()

import grequests


def exception_handler(request, exception):
    print "Request failed"


def set_meta(meta):
    def hook(r, **kwargs):
        r.meta = meta
        return r
    return hook


reqs = [
    grequests.get('http://httpbin.org/delay/1', timeout=0.001),
    grequests.get('http://fakedomain/'),
    grequests.get('http://httpbin.org/status/500', callback=set_meta({"title": 'it will 500',})),
    grequests.get('https://www.blackhatworld.com/seo/python-need-multiprocessing-god-to-help-me-advice-template-code-anything.1012254/', callback=set_meta({"title": 'it is bhw',}))]


for res in  grequests.imap(reqs, exception_handler=exception_handler):
    print res, res.meta