I'm not used to using bioinformatics tools. I'm trying to do a gsea prerank analysis.

I used gseapy using python.

However, the results seemed different from the gsea analysis used with gsea program from broad institute https://www.gsea-msigdb.org/gsea/index.jsp

the analysis using gseapy from python showed more results. For example gseapy showed 500 terms while gsea program showed only 40.

Is there a reason for this difference? Please let me know