docs: def upload_from_fs(fn, profile=None, label=None):
      """
      Saves image from fn with TMP prefix and returns img_id.
      """
      if not os.path.isfile(fn):
          raise ValueError('File is not exists: {}'.format(fn))
      if profile is None:
          profile = 'default'
      conf = get_profile_configs(profile)
      with open(fn, 'rb') as f:
          if not is_image(f, types=conf['TYPES']):
              msg = (('Format of uploaded file "%(name)s" is not allowed. '
                      'Allowed formats is: %(formats)s.') %
                     {'name': fn, 'formats': ', '.join(map(lambda t: t.upper(), conf['TYPES']))})
              raise RuntimeError(msg)
          return _custom_upload(f, profile, label, conf)