human
Solve the following python programming problem given the following code:
@ generated_jit (cache = True, nopython = True) 
def generated_usecase(x, y) : 
    if isinstance (y, types.Complex) : 
        def impl(x, y) : 
            return (x + y) 
else : 
        def impl(x, y) : 
            return (x - y) 
return impl 

    
    

    Fix the buggy line: if isinstance (y, types.Complex) :
assistant
#Here is Python code to fix the buggy line: if isinstance (y, types.

if isinstance (x, types.Complex) :