Hook Python function calls for debugging

debugHook.py

import subprocess
import os

def hook(hookfunc, oldfunc):
    def foo(*args, **kwargs):
        hookfunc(*args, **kwargs)
        return oldfunc(*args, **kwargs)
    return foo

def printFunction(*args, **kwargs):
    command = args[0]
    print(command)

def printCD(*args, **kwargs):
    path = args[0]
    print("cd " + path)

subprocess.call = hook(printFunction, subprocess.call)
os.chdir = hook(printCD, os.chdir)

I used this to figure out what a python build script was running