I run isbn.py and it shows this error
$ python pwb.py isbn.py -to13 -family:wikipedia -lang:en -page:List_of_Dragonlance_novels -simulate Retrieving 50 pages from wikipedia:fa. Traceback (most recent call last): File "pwb.py", line 248, in <module> if not main(): File "pwb.py", line 242, in main run_python_file(filename, [filename] + args, argvu, file_package) File "pwb.py", line 120, in run_python_file main_mod.__dict__) File "./scripts/isbn.py", line 1659, in <module> main() File "./scripts/isbn.py", line 1652, in main bot.run() File "./scripts/isbn.py", line 1521, in run self.treat(page) File "./scripts/isbn.py", line 1496, in treat new_text = self.isbnR.sub(_isbn10toIsbn13, new_text) File "./scripts/isbn.py", line 1458, in _isbn10toIsbn13 i13 = getIsbn(isbn).toISBN13() AttributeError: 'ISBN13' object has no attribute 'toISBN13' <type 'exceptions.AttributeError'> CRITICAL: Closing network session.