пример 1

import psutil
from time import time

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

@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()