پیام SyntaxError: Non-ASCII character '\xd9' in file ./tabchi.py on line 109, but no encoding declared; see http://python.org…

SyntaxError: Non-ASCII character '\xd9' in file ./tabchi.py on line 109, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details دوستان مشکلش چیه؟