Python时间测量函数

问题描述

我想创建一个 python 函数来测试在每个函数中花费的时间并用它的时间打印它的名称，我如何打印函数名称，如果有另一种方法可以这样做，请告诉我

I want to create a python function to test the time spent in each function and print its name with its time, how i can print the function name and if there is another way to do so please tell me

def measureTime(a):
    start = time.clock()
    a()
    elapsed = time.clock()
    elapsed = elapsed - start
    print "Time spent in (function name) is: ", elapsed

推荐答案

首先，我强烈建议使用 profiler 或至少使用 timeit.

First and foremost, I highly suggest using a profiler or atleast use timeit.

然而，如果你想严格地编写自己的计时方法来学习，这里是开始使用装饰器的地方.

However if you wanted to write your own timing method strictly to learn, here is somewhere to get started using a decorator.

Python 2:

def timing(f):
    def wrap(*args):
        time1 = time.time()
        ret = f(*args)
        time2 = time.time()
        print '%s function took %0.3f ms' % (f.func_name, (time2-time1)*1000.0)
        return ret
    return wrap

而且用法很简单，直接使用@timing装饰器即可:

And the usage is very simple, just use the @timing decorator:

@timing
def do_work():
  #code

Python 3:

def timing(f):
    def wrap(*args, **kwargs):
        time1 = time.time()
        ret = f(*args, **kwargs)
        time2 = time.time()
        print('{:s} function took {:.3f} ms'.format(f.__name__, (time2-time1)*1000.0))

        return ret
    return wrap

注意我正在调用 f.func_name 以获取字符串形式的函数名称(在 Python 2 中)或 f.__name__ 在 Python 3 中.

Note I'm calling f.func_name to get the function name as a string(in Python 2), or f.__name__ in Python 3.

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