// Version format is too complicated: https://www.python.org/dev/peps/pep-0386/
// So here is very simple parser working good enough for most packages
func filenameToVersion(fn string) string {
// Version format is too complicated: https://www.python.org/dev/peps/pep-0386/
// So here is very simple parser working good enough for most packages
func filenameToVersion(fn string) string {