python拦截苹果手机app,如何在python中应用拦截器

python拦截苹果手机app,如何在python中应用拦截器

I need to know when a function is called and do something after calling the function. It seems Interceptor can do it.

How can I use Interceptor in python ?

解决方案

This can be done using decorators:

from functools import wraps

def iterceptor(func):

print('this is executed at function definition time (def my_func)')

@wraps(func)

def wrapper(*args, **kwargs):

print('this is executed before function call')

result = func(*args, **kwargs)

print('this is executed after function call')

return result

return wrapper

@iterceptor

def my_func(n):

print('this is my_func')

print('n =', n)

my_func(4)

Output:

this is executed at function definition time (def my_func)

this is executed before function call

this is my_func

n = 4

this is executed after function call

@iterceptor replaces my_func with the result of execution of the iterceptor function, that is with wrapper function. wrapper wraps the given function in some code, usually preserving the arguments and execution result of wrappee, but adds some additional behavior.

@wraps(func) is there to copy the signature/docstring data of the function func onto the newly created wrapper function.

More info: