> ./test_fname.py
.
./usr
./usr/lib
./usr/lib/aspell
./usr/lib/aspell/es_affix.dat
./usr/lib/aspell/es.multi
./usr/lib/aspell/spanish.alias
./usr/lib/aspell/es.dat
./usr/share
./usr/share/aspell
./usr/share/aspell/es.cwl.gz
./usr/share/doc
./usr/share/doc/aspell-es
./usr/share/doc/aspell-es/README.gz
./usr/share/doc/aspell-es/changelog.Debian.gz
./usr/share/doc/aspell-es/copyright
./usr/share/doc/aspell-es/LEAME.gz
./var
./var/lib
./var/lib/aspell
./var/lib/aspell/es.rws
./var/lib/aspell/es.compat
./var/lib/dictionaries-common
./var/lib/dictionaries-common/aspell
./var/lib/dictionaries-common/aspell/aspell-es
./usr/lib/aspell/es.rws
./usr/lib/aspell/castellano8.alias
./usr/lib/aspell/castellano.alias
Traceback (most recent call last):
  File "./test_fname.py", line 12, in <module>
    print(filename);
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcf1' in position 21: surrogates not allowed