求大神解析下

if条件包含固定字符就没问题，不包含就报错

求解

下面是报错内容

'in <string>' requires string as left operand, not NoneType

Traceback (most recent call last):

 File "E:\影刀\ShadowBot\shadowbot-5.16.50\python\lib\runpy.py", line 193, in _run_module_as_main

   "__main__", mod_spec)

 File "E:\影刀\ShadowBot\shadowbot-5.16.50\python\lib\runpy.py", line 85, in _run_code

   exec(code, run_globals)

 File "E:\影刀\ShadowBot\shadowbot-5.16.50\python\lib\site-packages\xbot_interpreter.py", line 113, in <module>

   main()

 File "E:\影刀\ShadowBot\shadowbot-5.16.50\python\lib\site-packages\xbot_interpreter.py", line 57, in main

   try:

 File "C:\Users\l\AppData\Local\ShadowBot\users\680986079020666882\apps\f8cd01e8-09a9-490f-81f3-3a9a1392e91c\xbot_robot\process10.py", line 27, in main

   if xbot_visual.workflow.test(operand1=微信聊天内容A, operator="in", operand2=中文字符, operator_options="{\"ignoreCase\":\"False\"}", _block=("子流程10", 8, "IF 条件")):

 File "<string>", line 92, in wrapper

 File "<string>", line 87, in wrapper

 File "<string>", line 166, in test

TypeError: 'in <string>' requires string as left operand, not NoneType