删除excel中重复项，提示不能通过索引访问“Nonetype”

Traceback (most recent call last):

 File "/Applications/影刀.app/Contents/Resources/app/node_modules/xbot-engine/lib/lib/python3.7/runpy.py", line 193, in _run_module_as_main

   "__main__", mod_spec)

 File "/Applications/影刀.app/Contents/Resources/app/node_modules/xbot-engine/lib/lib/python3.7/runpy.py", line 85, in _run_code

   exec(code, run_globals)

 File "/Applications/影刀.app/Contents/Resources/app/node_modules/xbot-engine/lib/lib/python3.7/site-packages/xbot_interpreter.py", line 97, in <module>

   main()

 File "/Applications/影刀.app/Contents/Resources/app/node_modules/xbot-engine/lib/lib/python3.7/site-packages/xbot_interpreter.py", line 59, in main

   mod.main(args)

 File "/Users/yeky/Library/Application Support/Shadowbot/users/119290316368662530/apps/5e96d26d-55b1-4acd-b851-55e9aad48f81/xbot_robot/process1.py", line 80, in main

   xbot_visual.excel.remove_duplicate_row(workbook=excel_instance, column_name="A,B,E", start_row="1", contain_header=True, sheet_name="", _block=("库存数据获取", 65, "删除重复行"))

 File "<string>", line 89, in wrapper

 File "<string>", line 84, in wrapper

 File "<string>", line 1097, in remove_duplicate_row

 File "<string>", line 585, in remove_duplicate_row

 File "<string>", line 585, in <listcomp>

 File "<string>", line 585, in <listcomp>

TypeError: 'NoneType' object is not subscriptable

已经遍历过数据中是否存在none，遍历结果没有none