human
Solve the following python programming problem given the following code:
def _write_Matrix4x4(self, out) : 
    code = "
        def __getstate__(self):
            d = tvtk_base.TVTKBase.__getstate__(self)
            obj = self._vtk_obj
            e = [obj.GetElement(i, j) for i in range(4) for j in range(4)]
            d['elements'] = e
            return d

        def __setstate__(self, dict):
            e = dict.pop('elements')
            tvtk_base.TVTKBase.__setstate__(self, dict)
            self._in_set = 1
            obj = self._vtk_obj
            [obj.SetElement(i, j, e[4*i+j]) for i in range(4) for j in range(4)]
            self._in_set = 0
            self.update_traits()

        def from_array(self, arr):
            '''Set the value of the matrix using the passed
            Numeric array or Python list.
            '''
            obj = self._vtk_obj
            [obj.SetElement(i, j, arr[i,j]) for i in range(4) for j in range(4)]

        def to_array(self):
            '''Return the object as a numpy array.'''
            obj = self._vtk_obj
            e = [obj.GetElement(i, j) for i in range(4) for j in range(4)]
            arr = array_handler.numpy.array(e, dtype=float)
            arr.shape = (4,4)
            return arr

        " 
    out.write (self.indent.format (self)) 

    
    

    Fix the buggy line: out.write (self.indent.format (self))
assistant
#Here is Python code to fix the buggy line: out.

out.write (self.indent.format (code))