Looking for a regex to test for filenames with multiple extensions

I am looking for regular expression to test for files with more than one extensions, i.e test.1.log.old

Thank开发者_如何学Pythons, M.

If you are only testing filenames, then this will work.

(.[^.]+\.){2}

You may need to modify the regex if you try to match against more than file names (path).