human
Solve the following python programming problem given the following code:
@ overload (np.random.randn) 
def randn(* size) : 
    if (len (size) == 0) : 
        def randn_impl() : 
            return np.random.standard_normal () 
else : 
        def randn_impl(* size) : 
            return np.random.standard_normal (size) 
return size 

    
    

    Fix the buggy line: return size
assistant
#Here is Python code to fix the buggy line: return size
.

return def randn_impl(