有沒有辦法限制某個函數被某個函數調用？

Question

有沒有辦法限制某個函數被特定函數調用？

def a(): 
    private() # okay 

def b(): 
    private() # raises error 

def private(): 
    print "private" 

Answer 1

import inspect 
def private(): 
    cframe = inspect.currentframe() 
    func = inspect.getframeinfo(cframe.f_back).function 
    if func != 'a': 
     print 'not allowed from ', func 
    print "private"