lib/aubio/midiconv.py: prepare for python3

diff --git a/python/lib/aubio/midiconv.py b/python/lib/aubio/midiconv.py
index 5937be6..a2bcfb2 100644 (file)
--- a/python/lib/aubio/midiconv.py
+++ b/python/lib/aubio/midiconv.py
@@ -1,12 +1,19 @@
 # -*- coding: utf-8 -*-
 
+import sys
+PY3 = sys.version_info[0] == 3
+if PY3:
+    string_types = [str]
+else:
+    string_types = [str, unicode]
+
 def note2midi(note):
     " convert note name to midi note number, e.g. [C-1, G9] -> [0, 127] "
     _valid_notenames = {'C': 0, 'D': 2, 'E': 4, 'F': 5, 'G': 7, 'A': 9, 'B': 11}
     _valid_modifiers = {None: 0, u'♮': 0, '#': +1, u'♯': +1, u'\udd2a': +2, 'b': -1, u'♭': -1, u'\ufffd': -2}
     _valid_octaves = range(-1, 10)
-    if type(note) not in (str, unicode):
-        raise TypeError("a string is required, got %s" % note)
+    if type(note) not in string_types:
+        raise TypeError("a string is required, got %s (%s)" % (note, str(type(note)) ))
     if not (1 < len(note) < 5):
         raise ValueError(
                 "string of 2 to 4 characters expected, got %d (%s)" %