New submission from YasirA <yarsanukaev@gmail.com>: In the Template example, there's no placeholder to be substituted with date. I think it should be rewritten along the following lines: >>> import time, os.path >>> photofiles = ['img_1074.jpg', 'img_1076.jpg', 'img_1077.jpg'] >>> class BatchRename(Template): ... delimiter = '%' >>> fmt = input('Enter rename style (%d-date %n-seqnum %f-format): ') Enter rename style (%d-date %n-seqnum %f-format): Ashley_%d%n%f >>> t = BatchRename(fmt) >>> date = time.strftime('%d%b%y') >>> for i, filename in enumerate(photofiles): ... base, ext = os.path.splitext(filename) ... newname = t.substitute(d=date+'_', n=i, f=ext) ... print('{0} --> {1}'.format(filename, newname)) img_1074.jpg --> Ashley_0.jpg img_1076.jpg --> Ashley_1.jpg img_1077.jpg --> Ashley_2.jpg Yasir. ---------- assignee: docs@python components: Documentation messages: 338714 nosy: YasirA, docs@python priority: normal severity: normal status: open title: Brief Tour of the Standard Library — Part II example problem versions: Python 3.7 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue36413> _______________________________________