code: def alt(e1, e2):
      L1, L2, L3 = Label(), Label(), Label()
      return [L1] + e1 + [Jmp(L3), L2] + e2 + [L3]
  
imports: from whoosh.automata.fst import Arc
label_desc: Use image node_id 2 for calling a global function with example usage: alt(e1, e2) and returns: unknown