Move towards python 3

isine.py

@@ -4,8 +4,10 @@
 >>> change(880)
 '''
 
+from __future__ import print_function
+
 from threading import Thread
-from Queue import Queue, Empty
+from queue import Queue, Empty
 from math import pi, sin
 import struct
 import alsaaudio
@@ -23,7 +25,7 @@ def digitize(s):
 def generate(frequency):
     # generate a buffer with a sine wave of frequency
     size = int(sampling_rate / frequency)
-    buffer = ''
+    buffer = bytes()
     for i in range(size):
         buffer = buffer + digitize(sin(i/(2 * pi)))
 
@@ -55,7 +57,7 @@ def change(self, frequency):
             factor = 1
 
         buf = generate(frequency) * factor
-        print 'factor: %d, frames: %d' % (factor, len(buf) / framesize)
+        print('factor: %d, frames: %d' % (factor, len(buf) / framesize))
 
         self.queue.put( buf)
 
@@ -64,7 +66,7 @@ def run(self):
         while True:
             try:
                 buffer = self.queue.get(False)
-                self.device.setperiodsize(len(buffer) / framesize)
+                self.device.setperiodsize(int(len(buffer) / framesize))
                 self.device.write(buffer)
             except Empty:
                 if buffer:

mixertest.py

@@ -17,6 +17,7 @@
 ## python mixertest.py Master 0,[un]mute   # [un]mute channel 0
 ## python mixertest.py Capture 0,[un]rec   # [dis/en]able capture on channel 0
 
+from __future__ import print_function
 
 import sys
 import getopt
@@ -25,19 +26,19 @@
 def list_mixers(kwargs):
     print("Available mixer controls:")
     for m in alsaaudio.mixers(**kwargs):
-        print("  '%s'\n" % m)
-    
+        print("  '%s'" % m)
+
 def show_mixer(name, kwargs):
     # Demonstrates how mixer settings are queried.
     try:
         mixer = alsaaudio.Mixer(name, **kwargs)
     except alsaaudio.ALSAAudioError:
-        sys.stderr.write("No such mixer\n")
+        print("No such mixer", file=sys.stderr)
         sys.exit(1)
 
     print("Mixer name: '%s'" % mixer.mixer())
     print("Capabilities: %s %s" % (' '.join(mixer.volumecap()),
-                                              ' '.join(mixer.switchcap())))
+                                   ' '.join(mixer.switchcap())))
     volumes = mixer.getvolume()
     for i in range(len(volumes)):
         print("Channel %i volume: %i%%" % (i,volumes[i]))
@@ -65,7 +66,7 @@ def set_mixer(name, args, kwargs):
     try:
         mixer = alsaaudio.Mixer(name, **kwargs)
     except alsaaudio.ALSAAudioError:
-        sys.stderr.write("No such mixer")
+        print("No such mixer", file=sys.stderr)
         sys.exit(1)
 
     if args.find(',') != -1:
@@ -96,8 +97,8 @@ def set_mixer(name, args, kwargs):
         mixer.setvolume(volume, channel)
 
 def usage():
-    sys.stderr.write('usage: mixertest.py [-c <card>] ' \
-                     '[ <control>[,<value>]]\n')
+    print('usage: mixertest.py [-c <card>] [ <control>[,<value>]]',
+          file=sys.stderr)
     sys.exit(2)
 
 if __name__ == '__main__':

playbacktest.py

@@ -13,17 +13,15 @@
 ## python playbacktest.py out.raw
 
 
-# Footnote: I'd normally use print instead of sys.std(out|err).write,
-# but we're in the middle of the conversion between python 2 and 3
-# and this code runs on both versions without conversion
+from __future__ import print_function
 
 import sys
 import time
 import getopt
 import alsaaudio
 
 def usage():
-    sys.stderr.write('usage: playbacktest.py [-c <card>] <file>\n')
+    print('usage: playbacktest.py [-c <card>] <file>', file=sys.stderr)
     sys.exit(2)
 
 if __name__ == '__main__':

playwav.py

@@ -2,9 +2,7 @@
 
 # Simple test script that plays (some) wav files
 
-
-# Footnote: I'd normally use print instead of sys.std(out|err).write,
-# but this version runs on python 2 and python 3 without conversion
+from __future__ import print_function
 
 import sys
 import wave
@@ -13,9 +11,8 @@
 
 def play(device, f):    
 
-
-    sys.stdout.write('%d channels, %d sampling rate\n' % (f.getnchannels(),
-                                                          f.getframerate()))
+    print('%d channels, %d sampling rate\n' % (f.getnchannels(),
+                                               f.getframerate()))
     # Set attributes
     device.setchannels(f.getnchannels())
     device.setrate(f.getframerate())
@@ -43,7 +40,7 @@ def play(device, f):
 
 
 def usage():
-    sys.stderr.write('usage: playwav.py [-c <card>] <file>\n')
+    print('usage: playwav.py [-c <card>] <file>', file=sys.stderr)
     sys.exit(2)
 
 if __name__ == '__main__':

recordtest.py

@@ -12,18 +12,17 @@
 ## python recordtest.py out.raw # talk to the microphone
 ## aplay -r 8000 -f S16_LE -c 1 out.raw
 
+#!/usr/bin/env python
 
-# Footnote: I'd normally use print instead of sys.std(out|err).write,
-# but we're in the middle of the conversion between python 2 and 3
-# and this code runs on both versions without conversion
+from __future__ import print_function
 
 import sys
 import time
 import getopt
 import alsaaudio
 
 def usage():
-    sys.stderr.write('usage: recordtest.py [-c <card>] <file>\n')
+    print('usage: recordtest.py [-c <card>] <file>', file=sys.stderr)
     sys.exit(2)
 
 if __name__ == '__main__':

test.py

@@ -1,11 +1,11 @@
 #!/usr/bin/env python
 
-# These are internal test. They shouldn't fail, but they don't cover all
-# of the ALSA API. Most of all PCM.read and PCM.write are missing.
+# These are internal tests. They shouldn't fail, but they don't cover all
+# of the ALSA API. Most importantly PCM.read and PCM.write are missing.
 # These need to be tested by playbacktest.py and recordtest.py
 
 # In case of a problem, run these tests. If they fail, file a bug report on
-# http://sourceforge.net/projects/pyalsaaudio
+# http://github.com/larsimmisch/pyalsaaudio/issues
 
 import unittest
 import alsaaudio