I’m new to using pyasn1 and am trying to convert a SEQUENCE type to a python class model following the Berkeley published PyASN1 programmer’s manual documentation

The IEC 61850-9-2 Section 8.5.2 Table 14 Encoding for a SavPdu is defined as

    SavPdu ::= SEQUENCE {
            noASDU   [0] IMPLICIT INTEGER (1..65535),
            security [1] ANY OPTIONAL,
            asdu     [2] IMPLICIT SEQUENCE OF ASDU        
    }

    ASDU ::= SEQUENCE {
        svID        [0] IMPLICIT VisibleString,
        datset      [1] IMPLICIT VisibleString OPTIONAL,
        smpCnt      [2] IMPLICIT OCTET STRING (SIZE(2)),
        confRev     [3] IMPLICIT OCTET STRING (SIZE(4)),
        refrTm      [4] IMPLICIT UtcTime OPTIONAL,
        smpSynch    [5] IMPLICIT OCTET STRING (SIZE(1)),
        smpRate     [6] IMPLICIT OCTET STRING (SIZE(2)) OPTIONAL,
        sample      [7] IMPLICIT OCTET STRING (SIZE(n)),
        smpMod      [8] IMPLICIT OCTET STRING (SIZE(2)) OPTIONAL
    }

This is my first attempt at creating a python class of the above model:

from pyasn1.type import constraint, namedtype, tag, univ

class SavPdu(univ.Sequence):
    componentType = namedtype.NamedTypes(
        namedtype.NamedType('noASDU', univ.Integer(suptypeSpec = constraint.ValueRangeConstraint(1,65535)).tagSet.tagImplicitly(tag.Tag(tag.tagClassContext, tag.tagFormatSimple, 0))),
        namedtype.NamedType('security', univ.Any), 
        namedtype.NamedType('asdu', univ.Sequence(ASDU).tagSet.tagImplicitly(tag.tagClassContext, tag.tagFormatSimple, 2))
    )

where ASDU is another python class defined elsewhere in the file.

Am I defining my class correctly based on the model and library?