Prepare release tools for python 3

      'checkvintf',

      '--check-compat',

  ]

  for device_path, real_path in dirmap.items():

  for device_path, real_path in sorted(dirmap.items()):

    common_command += ['--dirmap', '{}:{}'.format(device_path, real_path)]

  common_command += kernel_args

  common_command += shipping_api_level_args

  def PathToPatterns(path):

    if path[-1] == '/':

      path += '*'

    for device_path, target_files_rel_paths in DIR_SEARCH_PATHS.items():

    # Loop over all the entries in DIR_SEARCH_PATHS and find one where the key

    # is a prefix of path. In order to get find the correct prefix, sort the

    # entries by decreasing length of their keys, so that we check if longer

    # strings are prefixes before shorter strings. This is so that keys that

    # are substrings of other keys (like /system vs /system_ext) are checked

    # later, and we don't mistakenly mark a path that starts with /system_ext

    # as starting with only /system.

    for device_path, target_files_rel_paths in sorted(DIR_SEARCH_PATHS.items(), key=lambda i: len(i[0]), reverse=True):

      if path.startswith(device_path):

        suffix = path[len(device_path):]

        return [rel_path + suffix for rel_path in target_files_rel_paths]

  need_passwords = []

  key_passwords = {}

  devnull = open("/dev/null", "w+b")

  for k in sorted(keylist):

  # sorted() can't compare strings to None, so convert Nones to strings

  for k in sorted(keylist, key=lambda x: x if x is not None else ""):

    # We don't need a password for things that aren't really keys.

    if k in SPECIAL_CERT_STRINGS or k is None:

      no_passwords.append(k)

                compress_type=zipfile.ZIP_STORED)

    return

  with open('{}.pb'.format(output), 'w') as f:

  with open('{}.pb'.format(output), 'wb') as f:

    f.write(metadata_proto.SerializeToString())

  with open(output, 'w') as f:

    f.write(legacy_metadata)