Не работает пример с офф. сайта - pythondialog

#! /usr/bin/env python3

import locale, dialog
from dialog import Dialog

# This is almost always a good thing to do at the beginning of your programs.
locale.setlocale(locale.LC_ALL, '')

d = Dialog(dialog="dialog")
# Dialog.set_background_title() requires pythondialog 2.13 or later
d.set_background_title("My little program")
# For older versions, you can use:
#   d.add_persistent_args(["--backtitle", "My little program"])

# In pythondialog 3.x, you can compare the return code to d.OK, Dialog.OK or
# "ok" (same object). In pythondialog 2.x, you have to use d.DIALOG_OK, which
# is deprecated since version 3.0.0.
if d.yesno("Are you REALLY sure you want to see this?") == d.OK:
    d.msgbox("You have been warned...")

    # We could put non-empty items here (not only the tag for each entry)
    code, tags = d.checklist("What sandwich toppings do you like?",
                             choices=[("Catsup", "",             False),
                                      ("Mustard", "",            False),
                                      ("Pesto", "",              False),
                                      ("Mayonnaise", "",         True),
                                      ("Horse radish","",        True),
                                      ("Sun-dried tomatoes", "", True)],
                             title="Do you prefer ham or spam?",
                             backtitle="And now, for something "
                             "completely different...")
    if code == d.OK:
        # 'tags' now contains a list of the toppings chosen by the user
        pass
else:
    code, tag = d.menu("OK, then you have two options:",
                       choices=[("(1)", "Leave this fascinating example"),
                                ("(2)", "Leave this fascinating example")])
    if code == d.OK:
        # 'tag' is now either "(1)" or "(2)"
        pass

Traceback (most recent call last):
  File "dialog.py", line 3, in <module>
    import locale, dialog
  File "/home/dds/Рабочий стол/dialog.py", line 4, in <module>
    from dialog import Dialog
ImportError: cannot import name Dialog