本文实例讲述了python定时执行指定函数的方法。分享给大家供大家参考。具体实现方法如下：
# time a function using time.time() and the a @ function decorator
# tested with python24 vegaseat 21aug2005
import time
def print_timing(func):
def wrapper(*arg):
t1 = time.time()
res = func(*arg)
t2 = time.time()
print ‘%s took %0.3f ms’ % (func.func_name, (t2-t1)*1000.0)
return res
return wrapper
# declare the @ decorator just before the function, invokes print_timing()
@print_timing
def getprimelist(n):
“”” returns a list of prime numbers from 2 to < n using a sieve algorithm"""
if n < 2: return []
if n == 2: return [2]
# do only odd numbers starting at 3
s = range(3, n+1, 2)
# n**0.5 may be slightly faster than math.sqrt(n)
mroot = n ** 0.5
half = len(s)
i = 0
m = 3
while m