Class SequenceOfAndSetOfBase

pager_lib/pyasn1/type/univ.py:1635–2091

Create |ASN.1| schema or value object. |ASN.1| class is based on :class:`~pyasn1.type.base.ConstructedAsn1Type`, its objects are mutable and duck-type Python :class:`list` objects. Keyword Args ------------ componentType : :py:class:`~pyasn1.type.base.PyAsn1Item` derivative

# "Structured" ASN.1 types

class SequenceOfAndSetOfBase(base.ConstructedAsn1Type):
    """Create |ASN.1| schema or value object.

    |ASN.1| class is based on :class:`~pyasn1.type.base.ConstructedAsn1Type`,
    its objects are mutable and duck-type Python :class:`list` objects.

    Keyword Args
    ------------
    componentType : :py:class:`~pyasn1.type.base.PyAsn1Item` derivative
        A pyasn1 object representing ASN.1 type allowed within |ASN.1| type

    tagSet: :py:class:`~pyasn1.type.tag.TagSet`
        Object representing non-default ASN.1 tag(s)

    subtypeSpec: :py:class:`~pyasn1.type.constraint.ConstraintsIntersection`
        Object representing non-default ASN.1 subtype constraint(s). Constraints
        verification for |ASN.1| type can only occur on explicit
        `.isInconsistent` call.

    Examples
    --------

    .. code-block:: python

        class LotteryDraw(SequenceOf):  #  SetOf is similar
            '''
            ASN.1 specification:

            LotteryDraw ::= SEQUENCE OF INTEGER
            '''
            componentType = Integer()

        lotteryDraw = LotteryDraw()
        lotteryDraw.extend([123, 456, 789])
    """
    def __init__(self, *args, **kwargs):
        # support positional params for backward compatibility
        if args:
            for key, value in zip(('componentType', 'tagSet',
                                   'subtypeSpec'), args):
                if key in kwargs:
                    raise error.PyAsn1Error('Conflicting positional and keyword params!')
                kwargs['componentType'] = value

        self._componentValues = noValue

        base.ConstructedAsn1Type.__init__(self, **kwargs)

    # Python list protocol

    def __getitem__(self, idx):
        try:
            return self.getComponentByPosition(idx)

        except error.PyAsn1Error as exc:
            raise IndexError(exc)

    def __setitem__(self, idx, value):