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|tjjdtdt�|dk	r�|j||d|�ndS(s�Initialize a new DNS Update object.

        @param zone: The zone which is being updated.
        @type zone: A dns.name.Name or string
        @param rdclass: The class of the zone; defaults to dns.rdataclass.IN.
        @type rdclass: An int designating the class, or a string whose value
        is the name of a class.
        @param keyring: The TSIG keyring to use; defaults to None.
        @type keyring: dict
        @param keyname: The name of the TSIG key to use; defaults to None.
        The key must be defined in the keyring.  If a keyring is specified
        but a keyname is not, then the key used will be the first key in the
        keyring.  Note that the order of keys in a dictionary is not defined,
        so applications should supply a keyname when a keyring is used, unless
        they know the keyring contains only one key.
        @type keyname: dns.name.Name or string
        @param keyalgorithm: The TSIG algorithm to use; defaults to
        dns.tsig.default_algorithm.  Constants for TSIG algorithms are defined
        in dns.tsig, and the currently implemented algorithms are
        HMAC_MD5, HMAC_SHA1, HMAC_SHA224, HMAC_SHA256, HMAC_SHA384, and
        HMAC_SHA512.
        @type keyalgorithm: string
        tcreatetforce_uniquet	algorithmN(tsuperRt__init__tflagstdnstopcodetto_flagstUPDATEt
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c	Csb|dkr|j}n|j�}|j|||j|j||tt�}|j||�dS(s&Add a single RR to the update section.N(Rt	authoritytcoversRRtrdtypeRtadd(RRtttltrdtdeletingtsectionR!trrset((s0/usr/lib64/python2.7/site-packages/dns/update.pyt_add_rrAsc
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�nx�|D]}|j|||d|�qWn�|jd�}t|t�r]tjj|�}n|rv|j	||�nxH|D]@}	tjj|j||	|j�}|j|||d|�q}WdS(s�Add records.  The first argument is the replace mode.  If
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        is replaced with the specified contents.  The second
        argument is the section to add to.  The third argument
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                - rdataset...

                - ttl, rdata...

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cGs|jt|j||�dS(s�Add records.  The first argument is always a name.  The other
        arguments can be:

                - rdataset...

                - ttl, rdata...

                - ttl, rdtype, string...N(R6tFalseR (RRR3((s0/usr/lib64/python2.7/site-packages/dns/update.pyR#ss	c	Gst|ttf�r-tjj|d�}nt|�dkr�|j|j	|tj
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�q�WdS(s�Delete records.  The first argument is always a name.  The other
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#			
cGs|jt|j||�dS(sQReplace records.  The first argument is always a name.  The other
        arguments can be:

                - rdataset...

                - ttl, rdata...

                - ttl, rdtype, string...

        Note that if you want to replace the entire node, you should do
        a delete of the name followed by one or more calls to add.N(R6RR (RRR3((s0/usr/lib64/python2.7/site-packages/dns/update.pyR2�s
cGs~t|ttf�r-tjj|d�}nt|�dkr{|j|j	|tj
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dtt�}dS(sBRequire that an owner name (and optionally an rdata type,
        or specific rdataset) exists as a prerequisite to the
        execution of the update.  The first argument is always a name.
        The other arguments can be:

                - rdataset...

                - rdata...

                - rdtype, string...iiN(RRR
RRRRR8RtanswerRR9RR:RR*R+R0R1R-tinsertR6R7(RRR3R(R"((s0/usr/lib64/python2.7/site-packages/dns/update.pytpresent�s*
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�}dS(s�Require that an owner name (and optionally an rdata type) does
        not exist as a prerequisite to the execution of the update.N(RRR
RRRRRR;RR:RR9R(RRR"R(((s0/usr/lib64/python2.7/site-packages/dns/update.pytabsent�si��cCs1|dkr|j}ntt|�j||�S(scReturn a string containing the update in DNS compressed wire
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        @rtype: stringN(RRRRtto_wire(RRtmax_size((s0/usr/lib64/python2.7/site-packages/dns/update.pyR?�sN(t__name__t
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