Support Pickle protocol

[GoogleCodeExporter]

It would be nice if Metadata instances could be pickeled. They are essentially 
dicts, after all.

Original issue reported on code.google.com by elsdoer...@gmail.com on 11 Dec 2011 at 5:59

[GoogleCodeExporter]

What doesn't work about pickling right now?

Original comment by joe.wreschnig@gmail.com on 11 Dec 2011 at 10:22

[GoogleCodeExporter]

Trying further, I see that the error only occurs when using EasyID3, not with 
the default ID3 class. (I have not tried other types).

>>> import mutagen, pickle
>>> audio = mutagen.File(r'test.mp3', easy=True)
>>> pickle.dumps(audio)
.....
TypeError: can't pickle instancemethod objects

This is because audio.tags has load, save, and delete methods attached to the 
instance:

(in easyid3.py)

    def __init__(self, filename=None):
        self.__id3 = ID3()
        self.load = self.__id3.load
        self.save = self.__id3.save
        self.delete = self.__id3.delete

Original comment by elsdoer...@gmail.com on 16 Dec 2011 at 3:42

[GoogleCodeExporter]

This issue was closed by revision r131.

Original comment by reiter.christoph@gmail.com on 14 Aug 2012 at 10:51

• Changed state: Fixed