human
Solve the following python programming problem given the following code:
def comments(url, fb = '') : 
    'Return the number of times a URL was commented on in Facebook.' 
    if (not fb) : 
        def gfb(url) : 
            global fb 
            return fb (url) 
fb = json.loads (gfb (gfb)) 
else : 
        fb = json.loads (fb) 
return walkdict (fb, 'comment_count') 

    
    

    Fix the buggy line: fb = json.loads (gfb (gfb))
assistant
#Here is Python program to fix the buggy line: fb = json.

fb = json.loads (gfb (url))