python/singa/layer.py [582:603]:
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        else:
            raise TypeError("Wrong stride type.")

        self.odd_padding = (0, 0, 0, 0)
        if isinstance(padding, int):
            self.padding = (padding, padding)
        elif isinstance(padding, tuple) or isinstance(padding, list):
            if len(padding) == 2:
                self.padding = padding
            elif len(padding) == 4:
                _h_mask = padding[0] - padding[1]
                _w_mask = padding[2] - padding[3]
                # the odd paddding is the value that cannot be handled by the tuple padding (w, h) mode
                # so we need to firstly handle the input, then use the nomal padding method.
                self.odd_padding = (max(_h_mask, 0), max(-_h_mask, 0),
                                    max(_w_mask, 0), max(-_w_mask, 0))
                self.padding = (
                    padding[0] - self.odd_padding[0],
                    padding[2] - self.odd_padding[2],
                )
            else:
                raise TypeError("Wrong padding value.")
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python/singa/layer.py [938:959]:
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        else:
            raise TypeError("Wrong stride type.")

        self.odd_padding = (0, 0, 0, 0)
        if isinstance(padding, int):
            self.padding = (padding, padding)
        elif isinstance(padding, tuple) or isinstance(padding, list):
            if len(padding) == 2:
                self.padding = padding
            elif len(padding) == 4:
                _h_mask = padding[0] - padding[1]
                _w_mask = padding[2] - padding[3]
                # the odd paddding is the value that cannot be handled by the tuple padding (w, h) mode
                # so we need to firstly handle the input, then use the nomal padding method.
                self.odd_padding = (max(_h_mask, 0), max(-_h_mask, 0),
                                    max(_w_mask, 0), max(-_w_mask, 0))
                self.padding = (
                    padding[0] - self.odd_padding[0],
                    padding[2] - self.odd_padding[2],
                )
            else:
                raise TypeError("Wrong padding value.")
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