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generatorsN(tStringIOtBadZonecBseZdZRS(sThe zone is malformed.(t__name__t
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    dns.name.Name object, or it may be a string.  In the either case,
    if the name is relative it is treated as relative to the origin of
    the zone.

    @ivar rdclass: The zone's rdata class; the default is class IN.
    @type rdclass: int
    @ivar origin: The origin of the zone.
    @type origin: dns.name.Name object
    @ivar nodes: A dictionary mapping the names of nodes in the zone to the
    nodes themselves.
    @type nodes: dict
    @ivar relativize: should names in the zone be relativized?
    @type relativize: bool
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relativizecCs(||_||_i|_||_dS(s�Initialize a zone object.

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        @param name: the name of the node to find
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        @type create: bool
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r/d}nX|S(s�Get a node in the zone, possibly creating it.

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        @type name: dns.name.Name object or string
        @param create: should the node be created if it doesn't exist?
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cCs2|j|�}|jj|�r.|j|=ndS(shDelete the specified node if it exists.

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        The I{name}, I{rdtype}, and I{covers} parameters may be
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        type.

        The rdataset returned is not a copy; changes to it will change
        the zone.

        KeyError is raised if the name or type are not found.
        Use L{get_rdataset} if you want to have None returned instead.

        @param name: the owner name to look for
        @type name: DNS.name.Name object or string
        @param rdtype: the rdata type desired
        @type rdtype: int or string
        @param covers: the covered type (defaults to None)
        @type covers: int or string
        @param create: should the node and rdataset be created if they do not
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R RRRRt	rdatatypeRR2t
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        type.

        The rdataset returned is not a copy; changes to it will change
        the zone.

        None is returned if the name or type are not found.
        Use L{find_rdataset} if you want to have KeyError raised instead.

        @param name: the owner name to look for
        @type name: DNS.name.Name object or string
        @param rdtype: the rdata type desired
        @type rdtype: int or string
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cCs�|j|�}t|ttf�r9tjj|�}nt|ttf�rctjj|�}n|j|�}|dk	r�|j	|j
||�t|�dkr�|j|�q�ndS(s�Delete the rdataset matching I{rdtype} and I{covers}, if it
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        type.

        It is not an error if the node does not exist, or if there is no
        matching rdataset at the node.

        If the node has no rdatasets after the deletion, it will itself
        be deleted.

        @param name: the owner name to look for
        @type name: DNS.name.Name object or string
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        at the node, it stores I{replacement} itself.

        If the I{name} node does not exist, it is created.

        @param name: the owner name
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        This method is less efficient than the similar
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        name to the rdata.

        This method may not be used to create new nodes or rdatasets;
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        KeyError is raised if the name or type are not found.
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        @param name: the owner name to look for
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ccs�t|ttf�r*tjj|�}nt|ttf�rTtjj|�}nxi|j�D][\}}xL|D]D}|tjjks�|j|krt|j	|krt||fVqtqtWqaWdS(s�Return a generator which yields (name, rdataset) tuples for
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        in the zone's dictionary.
        @param relativize: if True, domain names in the output will be
        relativized to the zone's origin (if possible).
        @type relativize: bool
        @param nl: The end of line string.  If not specified, the
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        @type relativize: bool
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    @type last_name: dns.name.Name object
    @ivar current_origin: The current origin
    @type current_origin: dns.name.Name object
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    @type relativize: bool
    @ivar zone: the zone
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