tensorwatch/mpl/histogram.py [46:56]:
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    def clear_plot(self, stream_vis, clear_history):
        stream_vis.series.clear()
        self.clear_artists(stream_vis)

    def _show_stream_items(self, stream_vis, stream_items):
        """Paint the given stream_items in to visualizer. If visualizer is dirty then return False else True.
        """

        vals = self._extract_vals(stream_items)
        if not len(vals):
            return True
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tensorwatch/mpl/pie_chart.py [30:40]:
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    def clear_plot(self, stream_vis, clear_history):
        stream_vis.series.clear()
        self.clear_artists(stream_vis)

    def _show_stream_items(self, stream_vis, stream_items):
        """Paint the given stream_items in to visualizer. If visualizer is dirty then return False else True.
        """

        vals = self._extract_vals(stream_items)
        if not len(vals):
            return True
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