remove conditional

      If you choose to pass in a tuple, the tuple will be directly used as the

      charset during featurization.

      If charset is None, no charset will be passed to your featurizer. This

      is not recommended unless your featurizer doesn't have a charset parameter.

      If you pass in None, self.charset will be set to None. This is not

      recommended.

    max_length: Optional[int] (default: None)

      max_length should be equal to or larger than the length of the longest

      string that is being featurized. max_length is passed to the featurizer.

      OneHotFeaturizer pads all strings to max_length with spaces.

      If max_length is None, it is not passed to the featurizer.

    """

    charsets = {

      "protein": ('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',

      try:

        self.charset = charsets[charset]

      except KeyError:

        logger.warning("Charset is invalid. Treating as None...")

        logger.warning("Charset is invalid string. Treating as None...")

        self.charset = None

    elif isinstance(charset, tuple):

      self.charset = charset

    # Initialize featurizer

    try:

      if self.charset is None and self.max_length is None:

        featurizer = featurizer()

      elif self.charset is not None and self.max_length is None:

        featurizer = featurizer(charset = self.charset)

      elif self.charset is None and self.max_length is not None:

        featurizer = featurizer(max_length = self.max_length)

      else:

      featurizer = featurizer(charset = self.charset, max_length = self.max_length)

    except:

      logger.exception("Sorry! Your featurizer may not be supported yet.")