Ensure python 3.2 compatibility

diff --git a/sima/lib/meta.py b/sima/lib/meta.py
index 5c439c5742df959d36f17b9488d1f0fd357db178..cf130969b3193f7838d0200cc7654356dfbba9d5 100644 (file)
--- a/sima/lib/meta.py
+++ b/sima/lib/meta.py
@@ -21,7 +21,10 @@
 Defines some object to handle audio file metadata
 """
 
-import collections.abc  # python >= 3.3
+try:
+    from collections.abc import Set # python >= 3.3
+except ImportError:
+    from collections import Set # python 3.2
 import logging
 import re
 
@@ -159,7 +162,7 @@ class Artist(Meta):
             mbid = kwargs.get('musicbrainz_albumartistid').split(', ')[0]
         super().__init__(name=name, mbid=mbid)
 
-class MetaContainer(collections.abc.Set):
+class MetaContainer(Set):
 
     def __init__(self, iterable):
         self.elements = lst = []