def search(self, regex):
        try:
            spec = {'$or': [{'data.content'    : {'$regex': regex, '$options': 'im'}},
                            {'data.description': {'$regex': regex, '$options': 'im'}}]}
            fields = {'_id': 0}
            cur = self.db.docs.find(spec, fields)
        except Exception as e:
            raise DatabaseException(e)
        return [Document(**row) for row in cur]
def testPlotly(self):
        plotter = VoltageProfilePlotter(xaxis="frac_x")
        plotter.add_electrode(self.ie_LTO, "LTO insertion")
        plotter.add_electrode(self.ce_FF, "FeF3 conversion")
        fig = plotter.get_plotly_figure()
        self.assertEqual(fig.layout.xaxis.title.text, "Atomic Fraction of Li")
        plotter = VoltageProfilePlotter(xaxis="x_form")
        plotter.add_electrode(self.ce_FF, "FeF3 conversion")
        fig = plotter.get_plotly_figure()
        self.assertEqual(fig.layout.xaxis.title.text, "x in Li<sub>x</sub>FeF3")

        plotter.add_electrode(self.ie_LTO, "LTO insertion")
        fig = plotter.get_plotly_figure()
        self.assertEqual(fig.layout.xaxis.title.text, "x Workion Ion per Host F.U.")