1UC1F3R616/ThreadingPython.md

## ThreadingPython.md

      
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              ThreadingPython.md
            
          
Most Basic

import threading
threading.Thread(target=f, args=(a,b,c)).start()

Example 1

import queue
import threading
import urllib2

# Called by each thread
def get_url(q, url):
    q.put(urllib2.urlopen(url).read())

theurls = ["http://google.com", "http://yahoo.com"]

q = queue.Queue()

for u in theurls:
    t = threading.Thread(target=get_url, args = (q,u))
    t.daemon = True
    t.start()

s = list(q.queue)
print(s)

# Here program exits without complete execution because treads are daemonic and hence main thread gives no fuck for them
# if we use t.join() just bellow the t.start() then everything happens in a sync but it destroys the purpose of threading as sequential execution will be happening now
# if we have t.daemon=False then program will exit after all spawned threads have finished their work