def report(self):
    '\n        Report the metrics over all data seen so far.\n        '
    self.sync()
    return {k: v for (k, v) in self._data.items()}
Report the metrics over all data seen so far.
def report(self):
    '\n        \n        '
    self.sync()
    return {k: v for (k, v) in self._data.items()}