$ 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']
>>> l=os.listdir(u".")
>>> l
[u'\u0100']