code: def parse_encoding(value=None):
      
      if value is None:
          return ca_settings.CA_DEFAULT_ENCODING
      elif isinstance(value, Encoding):
          return value
      elif isinstance(value, six.string_types):
          if value == 'ASN1':
              value = 'DER'
  
          try:
              return getattr(Encoding, value)
          except AttributeError:
              raise ValueError('Unknown encoding: %s' % value)
      else:
          raise ValueError('Unknown type passed: %s' % type(value).__name__)
docs: Parse a value to a valid encoding.
  
      This function accepts either a member of
      :py:class:`~cg:cryptography.hazmat.primitives.serialization.Encoding` or a string describing a member. If
      no value is passed, it will assume ``PEM`` as a default value. Note that ``"ASN1"`` is treated as an alias
      for ``"DER"``.
  
          >>> parse_encoding()
          <Encoding.PEM: 'PEM'>
          >>> parse_encoding('DER')
          <Encoding.DER: 'DER'>
          >>> parse_encoding(Encoding.PEM)
          <Encoding.PEM: 'PEM'>