Question

Suppose from index.py with CGI, I have post file foo.fasta to display file. I want to change foo.fasta‘s file extension to be foo.aln in display file. How can I do it?

Answer 1

os.path.splitext(), os.rename()

for example:

# renamee is the file getting renamed, pre is the part of file name before extension and ext is current extension
pre, ext = os.path.splitext(renamee)
os.rename(renamee, pre + new_extension)