-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi List,
I have two problems, but it's possible that one solution will suffice. I am using a module called mutagen to extract audio metadata from .flac files. The output of mutagen is in the form of a dictionary, so In [1]: import mutagen.flac In [2]: metadata = mutagen.flac.Open("/home/bob/music/artists/The Incredible String Band/1967 The 5000 Spirits Or The Layers Of The Onion/08 The Hedgehog's Song.flac") In [3]: print metadata["artist"] [u'The Incredible String Band'] I now want to pass that string to another program, but I want to strip off the leading [u' and the trailing ']. However, this doesn't work: In [4]: artistName = metadata["artist"][3:-2] In [5]: print artistName [] I was expecting The Incredible String Band, not [] What am I doing wrong? Or what have I misunderstood? The other problem concerns the program that receives these arguments - it complains (and stops with an error) if one the arguments is empty. For example, the flac file may not have the date information: Traceback (most recent call last): File "/home/bob/Documents/scripts/python/flac2mp3v2.py", line 81, in <module> subprocess.call(['lame', '--add-id3v2', '--ignore-tag-errors', '--tt', str(metadata['title']), '--ta', str(metadata['artist']), '--tl', str(metadata['album']), '--ty', str(metadata['date']), '--tn', str(metadata['tracknumber']), '--tg', str(metadata['genre']), tempName1, tempName3]) File "/usr/lib/python2.7/site-packages/mutagen/__init__.py", line 85, in __getitem__ else: return self.tags[key] File "/usr/lib/python2.7/site-packages/mutagen/_vorbis.py", line 184, in __getitem__ if not values: raise KeyError, key KeyError: 'date' If it's possible to edit the string value that gets passed to subprocess.call('lame'...) - see problem #1 above, would it also be possible to define a default value if the original field is empty? Bob - -- Bob Williams System: Linux 3.11.10-7-desktop Distro: openSUSE 13.1 (x86_64) with KDE Development Platform: 4.12.2 Uptime: 12:00pm up 13 days 20:00, 6 users, load average: 0.10, 0.19, 0.26 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlMOH9sACgkQ0Sr7eZJrmU5ufACeILRlmiXt4CgDa6ZpdTI3Npm5 FToAn2+AcjNKGxJKU+9nE9IdsoEqlQdd =JpdC -----END PGP SIGNATURE----- _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor