"""
A simple threading example.
Two threads execute in parallel. 
One prints out "a", the other prints out "1"
"""

from threading import Thread
import time

class SayStuffThread(Thread):
	def __init__(self, stuff_to_say, how_many_times):
		Thread.__init__(self) # initialize the parent class
		self.stuff_to_say = stuff_to_say
		self.how_many_times = how_many_times
	
	def run(self):
		number = 0
		while(number < self.how_many_times):
			print(self.stuff_to_say)
			number += 1
			time.sleep(1)

def execute_in_parallel(n):
	thread1 = SayStuffThread("a", n)
	thread2 = SayStuffThread("1", n)
	thread1.start()
	thread2.start()
	# wait for threads to finish
	start_time = time.time()
	thread1.join()
	thread2.join()
	end_time = time.time()
	print(str(end_time - start_time) +" seconds")

if __name__ == "__main__":
	execute_in_parallel(5)








def show_variability():
	outcomes = {}
	for i in range(10):
		test_outcome = test(10000)
		if test_outcome in outcomes:
			outcomes[test_outcome] += 1
		else:
			outcomes[test_outcome] = 1
	print outcomes