old_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (C) 2009 Phil Sung
  #
  # This file is part of Zeya.
  #
  # Zeya is free software: you can redistribute it and/or modify it under the
  # terms of the GNU Affero General Public License as published by the Free
  # Software Foundation, either version 3 of the License, or (at your option) any
  # later version.
  #
  # Zeya is distributed in the hope that it will be useful, but WITHOUT ANY
  # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  # A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
  # details.
  #
  # You should have received a copy of the GNU Affero General Public License
  # along with Zeya. If not, see <http://www.gnu.org/licenses/>.
  
  
  # Utility functions.
  
  import re
  
  def tokenize_filename(filename):
      """
      Return a list such that sorting a list of filenames by tokenize_filename(f)
      yields some "reasonable" result.
  
      filename: string containing a filename
      """
      # Sort lexicographically by components of the path, except we treat runs of
      # digits as separate components and sort those by numeric value. That way
      # we can, for example, sort "9.ogg" and "10.ogg" in the sensible way.
      def maybe_convert_to_int(s):
          """
          Return int(s) if s represents an integer and s otherwise.
  
          s: a string
          """
          try:
              return int(s)
          except ValueError:
              return s
      return [maybe_convert_to_int(s) for s in re.split(r'(/|\d+)', filename)]
  
new_contents: # -*- coding: utf-8 -*-
  #
  # Copyright (C) 2009 Phil Sung
  #
  # This file is part of Zeya.
  #
  # Zeya is free software: you can redistribute it and/or modify it under the
  # terms of the GNU Affero General Public License as published by the Free
  # Software Foundation, either version 3 of the License, or (at your option) any
  # later version.
  #
  # Zeya is distributed in the hope that it will be useful, but WITHOUT ANY
  # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  # A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
  # details.
  #
  # You should have received a copy of the GNU Affero General Public License
  # along with Zeya. If not, see <http://www.gnu.org/licenses/>.
  
  
  # Utility functions.
  
  import re
  
  def tokenize_filename(filename):
      """
      Return a list such that sorting a list of filenames by tokenize_filename(f)
      yields some "reasonable" result.
  
      filename: string containing a filename
      """
      # Sort lexicographically by components of the path, except we treat runs of
      # digits as separate components and sort those by numeric value. That way
      # we can, for example, sort "9.ogg" and "10.ogg" in the sensible way.
      def maybe_convert_to_int(s):
          """
          Return int(s) if s represents an integer and s otherwise.
  
          s: a string
          """
          try:
              return int(s)
          except ValueError:
              # Normalize case so we alphabetize logically.
              return s.lower()
      return [maybe_convert_to_int(s) for s in re.split(r'(/|\d+)', filename)]
  
subject: normalize for case when sorting filenames.