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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _iterate_to_update_x_transforms(self):
 """Perform the inner iteration."""

        self._inner_iters = 0
        self._last_inner_error = float('inf')
        while self._inner_error_is_decreasing():
            print('  Starting inner iteration {0:03d}. Current err = {1:12.5E}'
                  ''.format(self._inner_iters, self._last_inner_error))
            self._update_x_transforms()
            self._inner_iters += 1