# b_threadingdecorator.py

# b_threadingdecorator.py

# running a function in the background with threading
# (apply threading to a function with a function @decorator)

import time
import threading
def background(f):
    def bg_f(*a, **kw):
        threading.Thread(target=f, args=a, kwargs=kw).start()
    return bg_f
#
# the @decorator forces this function to run in the background
@background
def counter(n):
    i = 0
    while i < n:
        print
        print i
        print
        i += 1
        time.sleep(0.5)  # 0.5 second delay
counter(10)
time.sleep(0.5)
print 'hello'
time.sleep(1.5)
print 'world'