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#Created By:Ravishankar Chavare

#version:python 3.7

#Date:10/04/2019

#File_des:How to get Return value from running Thread

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'''

To get Return value From thread function we can use queue

The queue module implements multi-producer, multi-consumer queues.

It is especially useful in threaded programming when information must be exchanged safely between multiple threads

'''

import queue #import queue

from threading import Thread #import Threading

#Simple Function retrun the value

def foo(val):

print('I am From Foo Function and val={0}'.format(val))

return val*val

#Create a Blank Queue for adding thread

que = queue.Queue()

#Create a anonymous function using lambda that will call foo() and and add that calling method to queue

#for further processing

fn=lambda q,arg1:q.put(foo(arg1))

#Now Normal Create A Thread using Threading.Thread(target=anomous function,args=(que,elements))

t = Thread(target=fn, args=(que, 5))

#Start That Thread

t.start()

#WAit Untill to Thread Execution

t.join()

#Now Main Part to get the result from foo Function call que.get() to get the return value

result = que.get()

#Print The Result Which is stored using que.get()

print(result)