code: def create_new_folder(self, current_path, title, subtitle, is_package):
          
          if current_path is None:
              current_path = ''
          if osp.isfile(current_path):
              current_path = osp.dirname(current_path)
          name, valid = QInputDialog.getText(self, title, subtitle,
                                             QLineEdit.Normal, "")
          if valid:
              dirname = osp.join(current_path, to_text_string(name))
              try:
                  os.mkdir(dirname)
              except EnvironmentError as error:
                  QMessageBox.critical(self, title,
                                       _("<b>Unable "
                                         "to create folder <i>%s</i></b>"
                                         "<br><br>Error message:<br>%s"
                                         ) % (dirname, to_text_string(error)))
              finally:
                  if is_package:
                      fname = osp.join(dirname, '__init__.py')
                      try:
                          with open(fname, 'wb') as f:
                              f.write(to_binary_string('#'))
                          return dirname
                      except EnvironmentError as error:
                          QMessageBox.critical(self, title,
                                               _("<b>Unable "
                                                 "to create file <i>%s</i></b>"
                                                 "<br><br>Error message:<br>%s"
                                                 ) % (fname,
                                                      to_text_string(error)))
docs: Create new folder