[mythtv-users] Rename a file problems

[David Crawford]

On 10 February 2012 15:49, David Crawford <davidcrawford83 at gmail.com> wrote:

>
>
> On 10 February 2012 15:44, David Crawford <davidcrawford83 at gmail.com>wrote:
>
>>
>>
>> On 10 February 2012 15:36, Raymond Wagner <raymond at wagnerrp.com> wrote:
>>
>>> On 2/10/2012 09:12, David Crawford wrote:
>>> > path = '%cn %cc %cN.srt'
>>>
>>> Doing this in Python means you've stored that string to the variable
>>> 'path'.  Now in Python, everything is object, and objects have methods.
>>> In this particular case, you want to use the 'replace' method, which
>>> replaces one string with another, and outputs the result.  That is
>>> this...
>>>
>>> >     path = path.replace('%'+tag, tmp)
>>>
>>> In Python, strings are 'mutable', meaning they cannot be changed.  The
>>> only way to modify the string stored to a variable is to store a new
>>> string to that variable, as described above.  Except you don't want that
>>> path string up there.  You want to use this one defined lower...
>>>
>>> > '%m-%d_%H-%i-%s_%cN_%T'
>>>
>>> So define that to a variable, and replace whatever the bindings can't
>>> handle.  That's what this does down here.
>>>
>>> > for (tag, data) in (('cn', 'channum'),('cc','callsign'),('cN','name')):
>>> >     tmp = unicode(chan[data]).replace('/','-')
>>> >     path = path.replace('%'+tag, tmp)
>>>
>>> It loops through those three sets of values, setting 'tag' to 'cn', and
>>> 'data' to 'channum' on the first pass.  The Channel class is configured
>>> to imitate a dictionary, or map, or associative array, depending on your
>>> programming language of preference.  When it pulls 'chan[data]', it is
>>> pulling the value mapped to the string currently stored in the 'data'
>>> variable, which is 'channum', out of that associative array.
>>>
>>> Now you're only trying to use %cN, so there is no need for this
>>> construct.  You can just do the following directly...
>>>
>>> > path = '%m-%d_%H-%i-%s_%cN_%T'
>>> > chan = Channel(chanid)
>>> > path = path.replace('%cN', chan.name)
>>>
>>> The Channel class makes all of those associative array values also
>>> available as class attributes.  Attributes are just variables stored
>>> against an object, and accessed in the same manner as methods (with a
>>> '.').  Remember, you still need to feed this new, modified path into the
>>> 'formatPath' method, to get out your desired result.
>>>
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>>>
>>
>> Hi Raymond,
>
> Thanks for the insights, i've now changed the script around a bit. The
> thing is I still don't know how to feed the replaced object in this case
> %cN into the format.path
>
> it just gives me the same output and prints the path:
>  path = '%m-%d_%H-%i-%sBBC ONE_%T'
>
> How to I feed this into
> newbase = prog.formatPath('%m-%d_%H-%i-%s_%cN_%T').rsplit('.',1)[0] ?
>
> This is the script up to date:
>
> #!/usr/bin/python
>
> import sys
> import os
> from MythTV import Channel
> from MythTV import MythBE, findfile
> from MythTV import System
>
>
> if len(sys.argv) != 3:
>     raise Exception('Invalid argument count')
> chanid, starttime = sys.argv[1:3]
>
> be = MythBE()
> prog = be.getRecording(chanid, starttime)
> path = '%m-%d_%H-%i-%s_%cN_%T'
> chan = Channel(chanid)
> path = path.replace('%cN', chan.name)
> oldbase = prog.filename.rsplit('.',1)[0]
> newbase = prog.formatPath('%m-%d_%H-%i-%s_%cN_%T').rsplit('.',1)[0]
> sg = findfile(prog.filename, prog.storagegroup)
> if sg is None:
>     raise Exception('file not found')
>
>
> ccextractor = System(path="/home/dave/uksub2srt/uksub2srt.py")
> ccextractor('-i', os.path.join(sg.dirname, prog.filename),
>              '-o',
> '/home/dave/Downloads/subtitles/{0}.srt'.format(newbase))
> print path
>
> Remember, you still need to feed this new, modified path into the
'formatPath' method, to get out your desired result.

Still can't figure this part out. Can anyone tell me how I can add this
value:
path = path.replace('%cN', chan.name)

so it works with the 'formatPath'

Thought it might work just adding it all to one line but it gives me a
syntax error. Is there a certain command i need to add?

cheers
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