学习python的时候写好代码 提示这个怎么搞

不能通过索引访问 "列表" 值
Traceback (most recent call last):
File "C:\Program Files (x86)\ShadowBot\shadowbot-5.12.31\python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Program Files (x86)\ShadowBot\shadowbot-5.12.31\python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Program Files (x86)\ShadowBot\shadowbot-5.12.31\python\lib\site-packages\xbot_interpreter.py", line 87, in <module>
main()
File "C:\Program Files (x86)\ShadowBot\shadowbot-5.12.31\python\lib\site-packages\xbot_interpreter.py", line 47, in main
try:
File "C:\Users\111\AppData\Local\ShadowBot\users\66624894-9754-45c4-adb4-82ce2eaa5163\apps\fb263b20-b923-4c1f-890a-22ba93dd2750\xbot_robot\module2.py", line 14, in main
print(let[0])
TypeError: 'set' object is not subscriptable