$ perl -MB -E 'open(my $f, ">", "\x{C4}\x{80}\x{A0}.txt") or die "$!"'
$ python2.7
Python 2.7.18 (default, Oct 10 2021, 22:29:32) 
[GCC 11.1.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> l=os.listdir('.')
>>> l
['\xc4\x80\xa0.txt', '\xc4\x80']
>>> l=os.listdir(u'.')
>>> l
['\xc4\x80\xa0.txt', u'\u0100']