code: def from_epsg(code):
      """Given an integer code, returns an EPSG-like mapping.
  
      Note: the input code is not validated against an EPSG database.
      """
      if int(code) <= 0:
          raise ValueError("EPSG codes are positive integers")
      return {"init": "epsg:%s" % code, "no_defs": True}
  
label_desc: Use image node_id 3 for calling a global function with example usage: from_epsg(code) and returns: dict