aceback (most recent call last):
File "/Users/will/doc/code/python/2.py", line 17, in <module>
ak.match_main_contract(symbol="ine")
File "/Users/will/doc/code/python/.venv/lib/python3.9/site-packages/akshare/futures/futures_zh_sina.py", line 181, in match_main_contract
exchange_symbol_list = zh_subscribe_exchange_symbol(symbol).iloc[:, 1].tolist()
AttributeError: 'NoneType' object has no attribute 'iloc'
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error code
环境: macos python 3.9.6 akshare. == 1.14.93