Python中的分析：谁调用函数？(Profiling in Python: Who called the function?)

Python中的分析：谁调用函数？(Profiling in Python: Who called the function?)

我使用cProfile在Python中进行cProfile 。 我发现一个需要大量CPU时间的功能。 最重要的功能是什么？

编辑：

我会解决一个解决方法：我可以在那个重要的函数中编写一个Python行，它将打印调用它的函数的名称？

I'm profiling in Python using cProfile. I found a function that takes a lot of CPU time. How do I find out which function is calling this heavy function the most?

EDIT:

I'll settle for a workaround: Can I write a Python line inside that heavy function that will print the name of the function that called it?

最满意答案

这可能不直接回答你的问题，但一定会有帮助。 如果使用具有选项--sort累积的分析器，它将按累积时间对功能进行排序。 这有助于检测不仅重要的功能，而且检测它们的功能。

python -m cProfile --sort cumulative myScript.py

有一个解决方法来获取调用者的功能：

import inspect print inspect.getframeinfo(inspect.currentframe().f_back)[2]

您可以添加任意数量的f_back，以防您想要呼叫方来电等待。如果要计算频繁呼叫，您可以这样做：

record = {} caller = inspect.getframeinfo(inspect.currentframe().f_back)[2] record[caller] = record.get(caller, 0) + 1

然后按照频率顺序打印：

print sorted(record.items(), key=lambda a: a[1])

That may not answer your question directly, but will definitely help. If use the profiler with option --sort cumulative it will sort the functions by cumulative time. Which is helpful to detect not only heavy functions but the functions that call them.

python -m cProfile --sort cumulative myScript.py

There is a workaround to get the caller function:

import inspect print inspect.getframeinfo(inspect.currentframe().f_back)[2]

You can add as many f_back as you want in case you want the caller caller etc If you want to calculate frequent calls you can do this:

record = {} caller = inspect.getframeinfo(inspect.currentframe().f_back)[2] record[caller] = record.get(caller, 0) + 1

Then print them by order of frequency:

print sorted(record.items(), key=lambda a: a[1])