def plot(self):
    if len(self):
        logger = self[0]
        keys = logger.tracker.data.keys()
        plt.figure(figsize=((4 * len(keys)), 3))
        for (i, key) in enumerate(keys):
            plt.subplot(1, len(keys), (i + 1))
            plt.title(key)
            for logger in self:
                logger.plot(key)
            plt.legend()
        plt.savefig(self.path)
def plot(self):
    if len(self):
        logger = self[0]
        keys = logger.tracker.data.keys()
        plt.figure(figsize=((4 * len(keys)), 3))
        for (i, key) in enumerate(keys):
            plt.subplot(1, len(keys), (i + 1))
            plt.title(key)
            for logger in self:
                logger.plot(key)
            plt.legend()
        plt.savefig(self.path)