查找一个函数的所有函数调用 [英] Find all function calls by a function

问题描述

找到一个函数进行的所有函数调用的最佳方法是什么?我想在运行时执行此操作(可能使用装饰器).

What is the best way to find all function calls that a function makes? I want to do this at runtime (likely with a decorator).

是使用 inspect 检索源代码的最佳方法(这意味着我将不得不访问源代码...因此没有交互式解释器支持)，然后使用 ast ?有更好的方法吗?

Is the best way to retrieve the source code with inspect (this means that I will have to have access to the source code...so no interactive interpreter support) and then parse it with ast? Is there a better way?

Python 2.7是首选，但不是必需的.我希望它足够简单，自己动手做.如果其他人做到了，我将看一下源代码，以便找出答案.

Python 2.7 preferred, but not required. I'd like it to be simple enough to do myself. If others have done it, I would look at the source code so I could figure it out.

最终，我只会对使用特定装饰器的函数感兴趣，但是在SO上已经有该部分的答案.

Ultimately, I will only be interested in calls to functions with a particular decorator, but there are already answers to that part on SO.

def f():
    return g(1)


@Interesting
def g(x):
    return x + 1

print what_interesting_functions_does_this_call(f)

打印

(<function g at 0x7f2a1ec72a28>,)

我现在意识到，由于Python的动态性，在一般情况下这是不可能的.但是我可以涵盖部分案例吗?

I realize now that because of how dynamic Python is, this is not possible in the general case. But could I cover some subset of cases?

FYI:您是个白痴，为什么您曾经想过能够说出另一个功能调用了什么功能，而我却想不出为什么这个功能会有用，所以它一定不会有用为您"是一个不错的回答.我想知道.

FYI: "You are an idiot and why would you ever think to be able to tell what functions are called by another function and I can't think of any reason why this would ever be useful, therefore it must not be useful for you" is an okay response. I would like to know.

推荐答案

>>> def a():
...    float("1.2")
...    int("1")
...    b()
...
>>> def b():
...    sum([1,2,3])
...
>>> a()
>>> import dis
>>> dis
<module 'dis' from 'C:\Python26\lib\dis.pyc'>
>>> dis.dis(a)
  2           0 LOAD_GLOBAL              0 (float)
              3 LOAD_CONST               1 ('1.2')
              6 CALL_FUNCTION            1
              9 POP_TOP

  3          10 LOAD_GLOBAL              1 (int)
             13 LOAD_CONST               2 ('1')
             16 CALL_FUNCTION            1
             19 POP_TOP

  4          20 LOAD_GLOBAL              2 (b)
             23 CALL_FUNCTION            0
             26 POP_TOP
             27 LOAD_CONST               0 (None)
             30 RETURN_VALUE
>>>

您可以只计算"CALL_FUNCTION" ...

you could just count the "CALL_FUNCTION" ...

总的来说，我不认为您想在生产代码中做类似的事情……

in general I dont think you want to do something like this in production code ...

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