def _ParseArgs(self):
    # From -n.
    self.num_objects = 5
    # From -c.
    self.processes = 1
    # From -k.
    self.threads = 1
    # From -p
    self.parallel_strategy = None
    # From -y
    self.num_slices = 4
    # From -s.
    self.thru_filesize = 1048576
    # From -d.
    self.directory = tempfile.gettempdir()
    # Keep track of whether or not to delete the directory upon completion.
    self.delete_directory = False
    # From -t.
    self.diag_tests = set(self.DEFAULT_DIAG_TESTS)
    # From -o.
    self.output_file = None
    # From -i.
    self.input_file = None
    # From -m.
    self.metadata_keys = {}

    if self.sub_opts:
      for o, a in self.sub_opts:
        if o == '-n':
          self.num_objects = self._ParsePositiveInteger(
              a, 'The -n parameter must be a positive integer.')
        if o == '-c':
          self.processes = self._ParsePositiveInteger(
              a, 'The -c parameter must be a positive integer.')
        if o == '-k':
          self.threads = self._ParsePositiveInteger(
              a, 'The -k parameter must be a positive integer.')
        if o == '-p':
          if a.lower() in self.PARALLEL_STRATEGIES:
            self.parallel_strategy = a.lower()
          else:
            raise CommandException(
                "'%s' is not a valid parallelism strategy." % a)
        if o == '-y':
          self.num_slices = self._ParsePositiveInteger(
              a, 'The -y parameter must be a positive integer.')
        if o == '-s':
          try:
            self.thru_filesize = HumanReadableToBytes(a)
          except ValueError:
            raise CommandException('Invalid -s parameter.')
        if o == '-d':
          self.directory = a
          if not os.path.exists(self.directory):
            self.delete_directory = True
            os.makedirs(self.directory)
        if o == '-t':
          self.diag_tests = set()
          for test_name in a.strip().split(','):
            if test_name.lower() not in self.ALL_DIAG_TESTS:
              raise CommandException("List of test names (-t) contains invalid "
                                     "test name '%s'." % test_name)
            self.diag_tests.add(test_name)
        if o == '-m':
          pieces = a.split(':')
          if len(pieces) != 2:
            raise CommandException(
                "Invalid metadata key-value combination '%s'." % a)
          key, value = pieces
          self.metadata_keys[key] = value
        if o == '-o':
          self.output_file = os.path.abspath(a)
        if o == '-i':
          self.input_file = os.path.abspath(a)
          if not os.path.isfile(self.input_file):
            raise CommandException("Invalid input file (-i): '%s'." % a)
          try:
            with open(self.input_file, 'r') as f:
              self.results = json.load(f)
              self.logger.info("Read input file: '%s'.", self.input_file)
          except ValueError:
            raise CommandException("Could not decode input file (-i): '%s'." %
                                   a)
          return

    # If parallelism is specified, default parallelism strategy to fan.
    if (self.processes > 1 or self.threads > 1) and not self.parallel_strategy:
      self.parallel_strategy = self.FAN
    elif self.processes == 1 and self.threads == 1 and self.parallel_strategy:
      raise CommandException(
          'Cannot specify parallelism strategy (-p) without also specifying '
          'multiple threads and/or processes (-c and/or -k).')

    if not self.args:
      self.RaiseWrongNumberOfArgumentsException()

    self.bucket_url = StorageUrlFromString(self.args[0])
    self.provider = self.bucket_url.scheme
    if not self.bucket_url.IsCloudUrl() and self.bucket_url.IsBucket():
      raise CommandException('The perfdiag command requires a URL that '
                             'specifies a bucket.\n"%s" is not '
                             'valid.' % self.args[0])

    if (self.thru_filesize > HumanReadableToBytes('2GiB') and
        (self.RTHRU in self.diag_tests or self.WTHRU in self.diag_tests)):
      raise CommandException(
          'For in-memory tests maximum file size is 2GiB. For larger file '
          'sizes, specify rthru_file and/or wthru_file with the -t option.')

    perform_slice = self.parallel_strategy in (self.SLICE, self.BOTH)
    slice_not_available = (
        self.provider == 's3' and self.diag_tests.intersection(self.WTHRU,
                                                               self.WTHRU_FILE))
    if perform_slice and slice_not_available:
      raise CommandException('Sliced uploads are not available for s3. '
                             'Use -p fan or sequential uploads for s3.')

    # Ensure the bucket exists.
    self.gsutil_api.GetBucket(self.bucket_url.bucket_name,
                              provider=self.bucket_url.scheme,
                              fields=['id'])
    self.exceptions = [httplib.HTTPException, socket.error, socket.gaierror,
                       socket.timeout, httplib.BadStatusLine,
                       ServiceException]

  # Command entry point.
Parses arguments for perfdiag command.
dataset/ETHPy150Open GoogleCloudPlatform/gsutil/gslib/commands/perfdiag.py/PerfDiagCommand._ParseArgs