пример 3

import psutil
from time import time

def toggle(decorator):
    """ позволить "подключать" и "отключать" декоратор """
    def new_decorator(fn):
        decorated = decorator(fn)

        def new_decorated(*x):
            if decorator.enabled:
                return decorated(*x)
            else:
                return fn(*x)

        return new_decorated

    decorator.enabled = True
    return new_decorator

def timed(fn):
    def decorated(*x):
        start = time()
        result = fn(*x)
        print "Executing %s took %d ms" % (fn.__name__, (time()-start)*1000)
        return result
    return decorated

@toggle(timed)
def cpuload():
    load = psutil.cpu_percent()
    print "cpuload() returns %d" % load
    return load

print "cpuload.__name__==" + cpuload.__name__
print "CPU load is %d%%" % cpuload()
timed.enabled = False
print "CPU load is %d%%" % cpuload()