human
Solve the following python programming problem given the following code:
@ docfiller 
def laplace(input, output = None, mode = 'reflect', cval = 0.0) : 
    'N-dimensional Laplace filter based on approximate second derivatives.

    Parameters
    ----------
    %(input)s
    %(output)s
    %(mode)s
    %(cval)s
    ' 
    def derivative2(input, axis, output, mode, cval) : 
        return correlate1d (input, [1, (- 2), 1], axis, output, mode, cval, 0) 
return generic_laplace (cval, derivative2, output, mode, cval) 

    
    

    Fix the buggy line: return generic_laplace (cval, derivative2, output, mode, cval)
assistant
#Here is Python code to fix the buggy line: return generic_laplace (cval, derivative2, output, mode, cval)
.

return generic_laplace (input, derivative2, output, mode, cval)