BIND 10 #2908: Python wrapper for ZoneTableAccessor and getZoneTableAccessor

[BIND 10 Development]

#2908: Python wrapper for ZoneTableAccessor and getZoneTableAccessor
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  pselkirk
            Priority:  medium        |                       Status:
           Component:  data source   |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20130611
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  5             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  shared memory data source
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by jinmei):

 Replying to [comment:8 vorner]:

 > '''Interface'''
 >
 > I don't think the python interface needs the explicit methods, like
 `is_last`. I believe the python iteration protocol is enough and these
 methods would only confuse python programmers.
 >
 > Second, I know the ticket says so, but it seems to be that „zone table“
 sounds already like the container holding zones, so it should be possible
 to iterate directly over it, like:
 >
 > {{{#!python
 > for zone in datasrc_clients.get_zone_table("sqlite3", True):
 >       # ...
 > }}}

 Right.  The usage shown in the ticket description wasn't really
 appropriate.

 I guess we'd implement it through tp_iter and tp_iternext members of
 `PyTypeObject` for the zone table (accessor).  See
 http://docs.python.org/3/c-api/typeobj.html
 searching for "tp_iter".

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Ticket URL: <http://bind10.isc.org/ticket/2908#comment:9>
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