"Damon Timm" <damont...@gmail.com> wrote
I am struggling, on a theoretical level, on how to map the various
filetype's tag/key naming conventions. I have already created my own
MusicFile objects to handle each filetype (with functions for
encoding/decoding) but I can't wrap my head around how to map the
tags.
I'd define a mapping table per file type that maps from a standad
set of keys to the file specific tag.
Then define a class that works with the generic tags.
You can then eirther subclass per file type and use the file specific
mapping(a class variable) to translate internally or just create a function
that takes the file mapping as a parameter(maybe in the init() ) and sets
it up for the generic methods to use.
And here is what I would need to do to find the song's TITLE text:
flac['title']
[u'Christmas Waltz']
mp3['TIT2'].text #notice this one takes another additional step, as well,
by specifying text !
[u'Christmas Waltz']
mp4['\xa9nam']
[u"Christmas Waltz"]
So if the file is mp3 the generic
foo.setTag('title')
will inside the setTag method do
def setTag(self, tag, value)
key = self.mapping[tag] # get file specific tag
fileData[key] = value # and use it
# or
self.value = fileData[key]
approach this. I know I could manually assign each key to a class
property (using the @property tag) ... but this seems tedious:
That would definitely be overklilll and not bvery flexible for adding new file
types.
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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