code: def bind_expression_to_resources(expr, resources):
      
      # bind the resources into the expression
      if resources is None:
          resources = {}
  
      # _subs stands for substitute.  It's not actually private, blaze just
      # prefixes symbol-manipulation methods with underscores to prevent
      # collisions with data column names.
      return expr._subs({
          k: bz.data(v, dshape=k.dshape) for k, v in iteritems(resources)
      })
docs: Bind a Blaze expression to resources.
  
      Parameters
      ----------
      expr : bz.Expr
          The expression to which we want to bind resources.
      resources : dict[bz.Symbol -> any]
          Mapping from the loadable terms of ``expr`` to actual data resources.
  
      Returns
      -------
      bound_expr : bz.Expr
          ``expr`` with bound resources.