code: def update_dimensions(self, dims):
          
  
          if isinstance(dims, collections.Mapping):
              dims = dims.itervalues()
  
          for dim in dims:
              # Defer to update dimension for dictionaries
              if isinstance(dim, dict):
                  self.update_dimension(**dim)
              # Replace if given a Dimension object
              elif isinstance(dim, Dimension):
                  self._dims[dim.name] = dim
              else:
                  raise TypeError("Unhandled type '{t}'"
                      "in update_dimensions".format(t=type(dim)))
docs: Update multiple dimension on the cube.
  
          .. code-block:: python
  
              cube.update_dimensions([
                  {'name' : 'ntime', 'global_size' : 10,
                  'lower_extent' : 2, 'upper_extent' : 7 },
                  {'name' : 'na', 'global_size' : 3,
                  'lower_extent' : 2, 'upper_extent' : 7 },
              ])
  
          Parameters
          ----------
          dims : list or dict:
              A list or dictionary of dimension updates