lesson05_global_variables.py

# SuperFastPython.com
# example of threads sharing data with global variables
from time import sleep
from threading import Thread

# custom function to be executed in a new thread
def task():
 # block for a moment
 sleep(1)
 # correctly scope the global variable
 global data
 # store data in the global variable
 data = 'Hello from a new thread'

# protect the entry point
if __name__ == '__main__':
 # define the global variable
 data = None
 # create a new thread
 thread = Thread(target=task)
 # start the thread
 thread.start()
 # wait for the thread to finish
 thread.join()
 # report the global variable
 print(data)