human
Solve the following python programming problem given the following code:
def _category_personas(qs, limit) : 
    def f() : 
        return randslice (qs, limit = limit) 
key = ('cat-personas:' + qs.query_key ()) 
    return caching.cached (qs, key) 

    
    

    Fix the buggy line: return caching.cached (qs, key)
assistant
#Here is Python program to fix the buggy line: return caching.

return caching.cached (def f(, key)