univ.py 文件源码

def clone(self, value=noValue, tagSet=None, subtypeSpec=None, namedValues=None):
        """Create a copy of a |ASN.1| type or object.

        Any parameters to the *clone()* method will replace corresponding
        properties of the |ASN.1| object.

        Parameters
        ----------
        value: :class:`int`, :class:`str` or |ASN.1| object
            Initialization value to pass to new ASN.1 object instead of
            inheriting one from the caller.

        tagSet: :py:class:`~pyasn1.type.tag.TagSet`
            Object representing ASN.1 tag(s) to use in new object instead of inheriting from the caller

        subtypeSpec: :py:class:`~pyasn1.type.constraint.ConstraintsIntersection`
            Object representing ASN.1 subtype constraint(s) to use in new object instead of inheriting from the caller

        namedValues: :py:class:`~pyasn1.type.namedval.NamedValues`
            Object representing symbolic aliases for numbers to use instead of inheriting from caller

        Returns
        -------
        :
            new instance of |ASN.1| type/value
        """
        if self.isNoValue(value):
            if self.isNoValue(tagSet, subtypeSpec, namedValues):
                return self
            value = self._value
        if tagSet is None:
            tagSet = self._tagSet
        if subtypeSpec is None:
            subtypeSpec = self._subtypeSpec
        if namedValues is None:
            namedValues = self.__namedValues
        return self.__class__(value, tagSet, subtypeSpec, namedValues)