human
Solve the following python programming problem given the following code:
@ it ("runs ancestor's before functions before its own") 
def s(w) : 
    @ w.parent.before 
    def parent_before(w) : 
        w.from_parent = 1 
@ w.child.before 
    def child_before(w) : 
        w.from_child = (1 + w.from_parent) 
@ w.child.it ('succeeds') 
    def f(w) : 
        pass 
w.parent.run (MockReporter ()) 
    assert (w.worlds [0].from_child == 2) 
    assert (parent_before.worlds [0].from_parent == 1) 

    
    

    Fix the buggy line: assert (parent_before.worlds [0].from_parent == 1)
assistant
#Here is Python program to fix the buggy line: assert (parent_before.

assert (w.worlds [0].from_parent == 1)