post_btn xpath in my html is different

[yuyi-7]

in my html, xpath of post_btn is /html/body/div[31]/div[1]/div[1]/div[2]/div[2]/a[1]
and after test by myself, it works

[yzy1997]

in my html, xpath of post_btn is /html/body/div[31]/div[1]/div[1]/div[2]/div[2]/a[1] and after test by myself, it works

Thank you for discovering the problem in my code. The question you raised is correct. Due to school management, I will no longer update the code. You are welcome to submit it directly to the main branch.