fnmatch module : force case-insensitive comparison?

[Jason R. Mastaler]

I'd like to use the fnmatch module to do case-insensitive comparison
regardless of operating system.  This doesn't seem possible.

The fnmatchcase method if provided to do global case-sensitive
comparisons, but there is no converse (e.g, fnmatchnocase) method.

This seems like an oversight to me.

Actually, it would seem easier to me to just add an extra option to
the fnmatch method to specify whether the comparison should be
case-sensitive or case-insensitive, with the default being
OS-dependent.

fnmatch(filename, pattern[, comparison])