code: def ravel(self, name=None):
          
          nbinsx = self.nbins(0)
          nbinsy = self.nbins(1)
          left_edge = self.xedgesl(1)
          right_edge = self.xedgesh(nbinsx)
          out = Hist(nbinsx * nbinsy,
                     left_edge, nbinsy * (right_edge - left_edge) + left_edge,
                     type=self.TYPE,
                     name=name,
                     title=self.title,
                     **self.decorators)
          for i, bin in enumerate(self.bins(overflow=False)):
              out.SetBinContent(i + 1, bin.value)
              out.SetBinError(i + 1, bin.error)
          return out
docs: Convert 2D histogram into 1D histogram with the y-axis repeated along
          the x-axis, similar to NumPy's ravel().