multi-thread example python source code

The code generate 10 multi threads for running single_function.
If you have look the pid in result, thread is finished by quickly proceeded.

..

import queue

from concurrent.futures import ThreadPoolExecutor

#function for thread

def single_function(input, pid, out_queue):

total = 0

for i in range(0,input):

for j in range(0, input):

for k in range(0, input):

total = total + 1

out_queue.put( {'index':pid, 'result':total })

#run thread

my_queue = queue.Queue()

with ThreadPoolExecutor(max_workers=10) as executor:

for pid in range(0, 10):

executor.submit(single_function, 100, pid, my_queue)

#get result of each thread

result = {}

while not my_queue.empty():

get = my_queue.get()

print(get)

#finish all thread

..

result

{'index': 1, 'result': 1000000}
{'index': 3, 'result': 1000000}
{'index': 2, 'result': 1000000}
{'index': 0, 'result': 1000000}
{'index': 5, 'result': 1000000}
{'index': 4, 'result': 1000000}
{'index': 8, 'result': 1000000}
{'index': 6, 'result': 1000000}
{'index': 9, 'result': 1000000}
{'index': 7, 'result': 1000000}