code: def breaks_from_bins(x_range, bins=30, center=None, boundary=None):
      
      if bins < 1:
          raise PlotnineError("Need at least one bin.")
      elif bins == 1:
          binwidth = x_range[1] - x_range[0]
          boundary = x_range[1]
      else:
          binwidth = (x_range[1]-x_range[0])/(bins-1)
  
      return breaks_from_binwidth(x_range, binwidth, center, boundary)
docs: Calculate breaks given binwidth
  
      Parameters
      ----------
      x_range : array_like
          Range over with to calculate the breaks. Must be
          of size 2.
      bins : int
          Number of bins
      center : float
          The center of one of the bins
      boundary : float
          A boundary between two bins
  
      Returns
      -------
      out : array_like
          Sequence of break points.