嘗試索引python dict時出現語法錯誤：(Pdb) o_model.flows{(<oemof.solph.network.Bus object at 0x7f3e9c6b3ea8>, <oemof.solph.network.Transformer object at 0x7f3e9c52ce08>): <oemof.solph.network.Flow object at 0x7f3e9c50d5f8>}這是字典的關鍵。：(Pdb) o_model.flows.keys()dict_keys([(<oemof.solph.network.Bus object at 0x7f3e9c6b3ea8>, <oemof.solph.network.Transformer object at 0x7f3e9c52ce08>)])所以我假設字典的關鍵是(<oemof.solph.network.Bus object at 0x7f3e9c6b3ea8>, <oemof.solph.network.Transformer object at 0x7f3e9c52ce08>)問題是我在嘗試o_model.flows使用上面提到的鍵索引 時遇到語法錯誤。通常我希望通過獲取<oemof.solph.network.Flow object at 0x7f3e9c50d5f8>dict的 value( )，但我得到了一個語法錯誤：(Pdb) o_model.flows[(<oemof.solph.network.Bus object at 0x7f3e9c6b3ea8>, <oemof.solph.network.Transformer object at 0x7f3e9c52ce08>)]*** SyntaxError: invalid syntax我做錯了什么？一些額外的：(Pdb) type(o_model.flows)<class 'dict'>