'Return ASN.1 type object by its position in fields set.
Parameters
idx: :py:class:`int`
Field index
Returns
ASN.1 type
Raises
: :class:`~pyasn1.error.PyAsn1Error`
If given position is out of fields range'

def getTypeByPosition(self, idx):

    try:
        return self.__namedTypes[idx].asn1Object
    except IndexError:
        raise error.PyAsn1Error('Type    position    out    of    range')
