def add(self, data, name=None):
        if name is None:
            n = len(self.data)
            while "Series %d"%n in self.data:
                n += 1
            name = "Series %d"%n
        self.column_names.append(name)
        self.data[name] = data
        return name
Appends a new column of data to the data source.
dataset/ETHPy150Open bokeh/bokeh/bokeh/models/sources.py/ColumnDataSource.add