duplicity does not handle accentuated character for folder path to save

[Thierry B.]

Duplicity version 0.8-series. (rev 1348)
Pyhon 2.7
Distro: Devuan GNU/Linux ascii

duplicity --verbosity debug --num-retries 3 --asynchronous-upload --cf-backend pca --volsize 100 ~/Téléchargements/ swift://thierrybo-desk_tests
/usr/local/bin/duplicity:69: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  if u'--pydevd' in sys.argv or os.getenv(u'PYDEVD', None):
Using temporary directory /tmp/duplicity-_0Apzy-tempdir
Traceback (innermost last):
  File "/usr/local/bin/duplicity", line 1678, in <module>
    with_tempdir(main)
  File "/usr/local/bin/duplicity", line 1664, in with_tempdir
    fn()
  File "/usr/local/bin/duplicity", line 1497, in main
    action = commandline.ProcessCommandLine(sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 1146, in ProcessCommandLine
    args = parse_cmdline_options(cmdline_list)
  File "/usr/local/lib/python2.7/dist-packages/duplicity/commandline.py", line 698, in parse_cmdline_options
    possible = [c for c in commands if c.startswith(cmd)]
 UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 17: ordinal not in range(128)

If I replace "~/Téléchargements/" with a path without accented characters it works