code: def array_extents(self, array_name, **kwargs):
          
  
          A = self.array(array_name, reify=False)
          return self.dim_extents(*A.shape, single=False)
docs: Return a list of lower and upper extents for
          the given array_name.
  
          .. code-block:: python
  
              cube.register("uvw", ("ntime", "na", 3), np.float64)
  
              (lt, ut), (la, ua), (_, _) = cube.array_extents("uvw")
  
          Parameters
          ----------
          array_name : string
              Name of an array registered on this hypercube
  
  
          Returns
          -------
          list
              List of (lower_extent, upper_extent) tuples
              associated with each array dimension