def create_y_axis(self, name, label=None, format=None, custom_format=False):
        axis = {}

        if custom_format and format:
            axis['tickFormat'] = format
        elif format:
            axis['tickFormat'] = "d3.format(',%s')" % format

        if label:
            axis['axisLabel'] = "'" + label + "'"

        # Add new axis to list of axis
        self.axislist[name] = axis
Always return a channel name:
dataset/ETHPy150Open areski/python-nvd3/nvd3/NVD3Chart.py/NVD3Chart.create_y_axis--crossover with--dataset/ETHPy150Open gawel/irc3/irc3/utils.py/as_channel