def addCallbacks(self, callback, errback,
                     callbackArgs=None, callbackKeywords=None,
                     errbackArgs=None, errbackKeywords=None):
        if self._finishAdded:
            raise AlreadyFinished()
        def callbackWithContext(*args, **kwargs):
            return self._action.run(callback, *args, **kwargs)
        def errbackWithContext(*args, **kwargs):
            return self._action.run(errback, *args, **kwargs)
        self.result.addCallbacks(callbackWithContext, errbackWithContext,
                                 callbackArgs, callbackKeywords, errbackArgs,
                                 errbackKeywords)
        return self
Using the quandl.com API, get the historical price (by day).
dataset/ETHPy150Open ClusterHQ/eliot/eliot/twisted.py/DeferredContext.addCallbacks--crossover with--dataset/ETHPy150Open priestc/moneywagon/moneywagon/historical_price.py/Quandl.get_historical_price