SKevo Hello, Hello, sorry. I was troubled by some work, which made me forget this post.
Luckily, I recalled it (it's not something to be proud of)
My local device is windows. After downloading the pyflarum-bulk-discussions you provided, I created some test markdown files in the discussions folder, and then executed the following code in powershell, but there was no change in my forum and no new posts were created.
The following is the command I changed. I confirm that the relevant fields I filled in are correct. Due to privacy, I have replaced the URL, user name and password with the relevant URL and user of the forum
python -m bulk_discussions -f https://test.flarum.org/ -u testuser -p testpassword