18ed53d7817338bba10a7f04cc5e250aa202206a,nilmtk/electric.py,Electric,power_series_all_data,#Electric#,61

Before Change

        chunks = []        
        for series in self.power_series(**kwargs):
            chunks.append(series)
        return pd.concat(chunks)

    def plot(self, **loader_kwargs):
        all_data = self.power_series_all_data(**loader_kwargs)
        all_data.plot()

After Change

        for series in self.power_series(**kwargs):
            if len(series) > 0:
                chunks.append(series)
        if chunks:
            all_data = pd.concat(chunks)
        else:
            all_data = None
        return all_data

    def plot(self, **loader_kwargs):
        all_data = self.power_series_all_data(**loader_kwargs)
        all_data.plot()

Instances