[mythtv-users] Python3 interface: Could not find setting 'BackendServerAddr' on host '192.168.1.10'

[Ross Boylan]

All the stuff in your example worked for me to.  It was only when I got to
the delete on the returned record that I ran into trouble.

While I'd like to understand what's going on, the services API may be an
easier route to get things going, though it too seems pretty opaque.
Thanks for the example.
Ross

On Sun, Feb 23, 2020 at 4:56 PM Bill Meek <keemllib at gmail.com> wrote:

> On 2/23/20 6:15 PM, Ross Boylan wrote:
> > Running mythtv 30 with fixes + the python3 code from
> https://github.com/rcrdnalor/mythtv, develop/python3. I gather that code
> has been merged
> > into Myth v31.
> > I have no idea if my problem is specific to these version, as I've made
> no serious use of the python interface before.
> >
> > I did a --user install of the libraries (and added that location to
> sys.path).  It seems there are actually 2 interfaces, one based fairly
> > directly on the Services API and one in a more pythonic style.  It's the
> latter I'm trying to use.
> >
> > db=MythTV.MythDB()  # I can startup the frontend from this account, and
> I assume MythDB() gets info from my config
> > bb=db.searchRecorded(title="Blue Bloods")
> > a = next(bb)
> > # various queries of a
> > a.delete()
> >
> ---------------------------------------------------------------------------
> > MythDBError                               Traceback (most recent call
> last)
> > <ipython-input-42-adfa98f44cbd> in <module>()
> > ----> 1 a.delete()
> >
> > /home/ross/.local/lib/python3.7/site-packages/MythTV/dataheap.py in
> delete(self, force, rerecord)
> >      375         """
> >      376         try:
> > --> 377             return self.getProgram().delete(force, rerecord)
> >      378         except AttributeError:
> >      379             raise MythError("Program could not be found")
> >
> > /home/ross/.local/lib/python3.7/site-packages/MythTV/dataheap.py in
> getProgram(self)
> >      387     def getProgram(self):
> >      388         """Recorded.getProgram() -> Program object"""
> > --> 389         return Program.fromRecorded(self)
> >      390
> >      391     def getRecordedFile(self):
> >
> > /home/ross/.local/lib/python3.7/site-packages/MythTV/mythproto.py in
> fromRecorded(cls, rec)
> >      953     @classmethod
> >      954     def fromRecorded(cls, rec):
> > --> 955         be = FileOps(db=rec._db)
> >      956         return be.getRecording(rec.chanid, rec.starttime)
> >      957
> >
> > /home/ross/.local/lib/python3.7/site-packages/MythTV/mythproto.py in
> __init__(self, backend, blockshutdown, events, db)
> >       78             # no backend given, use master
> >       79             self.host = self.db.settings.NULL.MasterServerIP
> > ---> 80             self.hostname = self.db._gethostfromaddr(self.host)
> >       81
> >       82         else:
> >
> > /home/ross/.local/lib/python3.7/site-packages/MythTV/database.py in
> _gethostfromaddr(self, addr, value)
> >     1346             else:
> >     1347                 raise MythDBError(MythError.DB_SETTING,
> > -> 1348                                     'BackendServerAddr', addr)
> >     1349
> >     1350         with self as cursor:
> >
> > MythDBError: Could not find setting 'BackendServerAddr' on host
> '192.168.1.10'
> >
> > Comments:
> > Maybe it is expecting a name, not an IP address?  If so, how do I fix it?
> > OTOH, the method name is gethostfromaddr.
> > dig -x on the IP returns the fully qualified host name.
> > The database and myth backend are both on the same IP.
>
> Correct, the PR is in v31. There were more v3 commits made in the v31
> cycle.
> I see ~46 commits total. There is no plan to support Python v3 in earlier
> MythTV versions.
>
> This works in v31:
>
> #!/usr/bin/python3
> import MythTV
> db=MythTV.MythDB()
> bb=db.searchRecorded(title="Blue Bloods")
> for a in bb:
>      print(a.title, '\t', a.starttime)
>
> Blue Bloods      2020-01-03 21:00:00-06:00
> Blue Bloods      2020-01-31 21:00:00-06:00
> Blue Bloods      2019-10-04 21:00:00-05:00
> Blue Bloods      2020-02-14 21:00:00-06:00
> Blue Bloods      2020-01-10 21:00:00-06:00
>
> Or, you can use the python services_api module. It works with
> v2 or v3. https://www.mythtv.org/wiki/Python_API_Examples
>
> #!/usr/bin/python2
> # -*- coding: utf-8 -*-
>
> '''
> Example: print_recordings.py <'optional recording title'>
> '''
>
> from __future__ import print_function
> import sys
> from MythTV.services_api import send as api
>
>
> def main():
>      """Check host, get recorded programs and print"""
>
>      try:
>          host = sys.argv[1]
>      except IndexError:
>          host = 'localhost'
>
>      backend = api.Send(host=host)
>
>      try:
>          resp_dict = backend.send(endpoint='Dvr/GetRecordedList')
>      except RuntimeError as error:
>          sys.exit('\nFatal error: "{}"'.format(error))
>
>      count = int(resp_dict['ProgramList']['Count'])
>      progs = resp_dict['ProgramList']['Programs']
>
>      if count < 1:
>          sys.exit('\nNo upcoming recordings found.\n')
>
>      for upcoming in range(count):
>          print('  {}  {:45.45}  {:15.15}'.format(
>              progs[upcoming]['Recording']['StartTs'],
>              progs[upcoming]['Title'],
>              progs[upcoming]['SubTitle']))
>
>
> if __name__ == '__main__':
>      main()
>
> # vim: set expandtab tabstop=4 shiftwidth=4 smartindent noai
> colorcolumn=80:
>
> --
> Bill
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