Remove support for Python 2 and require > 3.6

.github/workflows/main.yml

@@ -0,0 +1,25 @@
+name: Python Tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ["3.6", "3.7", "3.8", "3.9"]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install ffmpeg
+        run: sudo apt install -y ffmpeg
+      - name: Install tox and any other packages
+        run: pip install tox
+      - name: Run tox
+        # Run tox using the version of Python in `PATH`
+        run: tox -e py

README.rst

@@ -58,8 +58,7 @@ A second optional parameter to ``audio_open`` specifies which backends to try
 ``available_backends`` function to get a list backends that are usable on the
 current system.
 
-Audioread is "universal" and supports both Python 2 (2.6+) and Python 3
-(3.2+).
+Audioread supports Python 3 (3.6+).
 
 Example
 -------

audioread/ffdec.py

@@ -16,16 +16,13 @@
 output.
 """
 
-import sys
-import subprocess
+import os
+import queue
 import re
+import subprocess
+import sys
 import threading
 import time
-import os
-try:
-    import queue
-except ImportError:
-    import Queue as queue
 
 from .exceptions import DecodeError
 
@@ -62,7 +59,7 @@ class QueueReaderThread(threading.Thread):
     over a Queue.
     """
     def __init__(self, fh, blocksize=1024, discard=False):
-        super(QueueReaderThread, self).__init__()
+        super().__init__()
         self.fh = fh
         self.blocksize = blocksize
         self.daemon = True
@@ -121,7 +118,7 @@ def available():
 windows_error_mode_lock = threading.Lock()
 
 
-class FFmpegAudioFile(object):
+class FFmpegAudioFile:
     """An audio file decoded by the ffmpeg command-line utility."""
     def __init__(self, filename, block_size=4096):
         # On Windows, we need to disable the subprocess's crash dialog
@@ -227,7 +224,7 @@ def _get_info(self):
             line = line.strip().lower()
 
             if 'no such file' in line:
-                raise IOError('file not found')
+                raise OSError('file not found')
             elif 'invalid data found' in line:
                 raise UnsupportedError()
             elif 'duration:' in line:

audioread/gstdec.py

@@ -45,8 +45,6 @@
     >>>     print f.channels
     >>>     print f.duration
 """
-from __future__ import with_statement
-from __future__ import division
 
 import gi
 gi.require_version('Gst', '1.0')
@@ -55,20 +53,11 @@
 import sys
 import threading
 import os
+import queue
+from urllib.parse import quote
 
 from .exceptions import DecodeError
 
-try:
-    import queue
-except ImportError:
-    import Queue as queue
-
-try:
-    from urllib.parse import quote
-except ImportError:
-    from urllib import quote
-
-
 QUEUE_SIZE = 10
 BUFFER_SIZE = 10
 SENTINEL = '__GSTDEC_SENTINEL__'
@@ -83,7 +72,7 @@ class GStreamerError(DecodeError):
 class UnknownTypeError(GStreamerError):
     """Raised when Gstreamer can't decode the given file type."""
     def __init__(self, streaminfo):
-        super(UnknownTypeError, self).__init__(
+        super().__init__(
             "can't decode stream: " + streaminfo
         )
         self.streaminfo = streaminfo
@@ -99,7 +88,7 @@ class NoStreamError(GStreamerError):
     were found.
     """
     def __init__(self):
-        super(NoStreamError, self).__init__('no audio streams found')
+        super().__init__('no audio streams found')
 
 
 class MetadataMissingError(GStreamerError):
@@ -114,7 +103,7 @@ class IncompleteGStreamerError(GStreamerError):
     principal plugin packages) are missing.
     """
     def __init__(self):
-        super(IncompleteGStreamerError, self).__init__(
+        super().__init__(
             'missing GStreamer base plugins'
         )
 
@@ -142,7 +131,7 @@ class MainLoopThread(threading.Thread):
     """A daemon thread encapsulating a Gobject main loop.
     """
     def __init__(self):
-        super(MainLoopThread, self).__init__()
+        super().__init__()
         self.loop = GLib.MainLoop.new(None, False)
         self.daemon = True
 
@@ -152,7 +141,7 @@ def run(self):
 
 # The decoder.
 
-class GstAudioFile(object):
+class GstAudioFile:
     """Reads raw audio data from any audio file that Gstreamer
     knows how to decode.
 
@@ -373,17 +362,14 @@ def _message(self, bus, message):
 
     # Iteration.
 
-    def next(self):
+    def __next__(self):
         # Wait for data from the Gstreamer callbacks.
         val = self.queue.get()
         if val == SENTINEL:
             # End of stream.
             raise StopIteration
         return val
 
-    # For Python 3 compatibility.
-    __next__ = next
-
     def __iter__(self):
         return self
 
@@ -418,11 +404,6 @@ def close(self, force=False):
             # Halt the pipeline (closing file).
             self.pipeline.set_state(Gst.State.NULL)
 
-            # Delete the pipeline object. This seems to be necessary on Python
-            # 2, but not Python 3 for some reason: on 3.5, at least, the
-            # pipeline gets dereferenced automatically.
-            del self.pipeline
-
     def __del__(self):
         self.close()
 

audioread/macca.py

@@ -13,11 +13,11 @@
 # included in all copies or substantial portions of the Software.
 
 """Read audio files using CoreAudio on Mac OS X."""
-import os
-import sys
+import copy
 import ctypes
 import ctypes.util
-import copy
+import os
+import sys
 
 from .exceptions import DecodeError
 
@@ -110,20 +110,20 @@ def __init__(self, code):
             msg = 'unsupported format'
         else:
             msg = 'error %i' % code
-        super(MacError, self).__init__(msg)
+        super().__init__(msg)
 
 
 def check(err):
     """If err is nonzero, raise a MacError exception."""
     if err == ERROR_NOT_FOUND:
-        raise IOError('file not found')
+        raise OSError('file not found')
     elif err != 0:
         raise MacError(err)
 
 
 # CoreFoundation objects.
 
-class CFObject(object):
+class CFObject:
     def __init__(self, obj):
         if obj == 0:
             raise ValueError('object is zero')
@@ -142,7 +142,7 @@ def __init__(self, filename):
         url = _corefoundation.CFURLCreateFromFileSystemRepresentation(
             0, filename, len(filename), False
         )
-        super(CFURL, self).__init__(url)
+        super().__init__(url)
 
     def __str__(self):
         cfstr = _corefoundation.CFURLGetString(self._obj)
@@ -184,7 +184,7 @@ class AudioBufferList(ctypes.Structure):
 
 # Main functionality.
 
-class ExtAudioFile(object):
+class ExtAudioFile:
     """A CoreAudio "extended audio file". Reads information and raw PCM
     audio data from any file that CoreAudio knows how to decode.
 

audioread/maddec.py

@@ -14,14 +14,15 @@
 
 """Decode MPEG audio files with MAD (via pymad)."""
 import mad
+
 from . import DecodeError
 
 
 class UnsupportedError(DecodeError):
     """The file is not readable by MAD."""
 
 
-class MadAudioFile(object):
+class MadAudioFile:
     """MPEG audio file decoder using the MAD library."""
     def __init__(self, filename):
         self.fp = open(filename, 'rb')

audioread/rawread.py

@@ -13,23 +13,19 @@
 # included in all copies or substantial portions of the Software.
 
 """Uses standard-library modules to read AIFF, AIFF-C, and WAV files."""
-import wave
 import aifc
-import sunau
 import audioop
 import struct
-import sys
+import sunau
+import wave
 
 from .exceptions import DecodeError
 
 # Produce two-byte (16-bit) output samples.
 TARGET_WIDTH = 2
 
 # Python 3.4 added support for 24-bit (3-byte) samples.
-if sys.version_info > (3, 4, 0):
-    SUPPORTED_WIDTHS = (1, 2, 3, 4)
-else:
-    SUPPORTED_WIDTHS = (1, 2, 4)
+SUPPORTED_WIDTHS = (1, 2, 3, 4)
 
 
 class UnsupportedError(DecodeError):
@@ -54,7 +50,7 @@ def byteswap(s):
     return b''.join(parts)
 
 
-class RawAudioFile(object):
+class RawAudioFile:
     """An AIFF, WAV, or Au file that can be read by the Python standard
     library modules ``wave``, ``aifc``, and ``sunau``.
     """

decode.py

@@ -13,7 +13,6 @@
 # included in all copies or substantial portions of the Software.
 
 """Command-line tool to decode audio files to WAV files."""
-from __future__ import print_function
 import audioread
 import sys
 import os

setup.py

@@ -36,22 +36,15 @@ def _read(fn):
 
       packages=['audioread'],
 
-      tests_require=[
-          'pytest-runner',
-          'pytest'
-      ],
-
       classifiers=[
           'Topic :: Multimedia :: Sound/Audio :: Conversion',
           'Intended Audience :: Developers',
-          'Programming Language :: Python :: 2',
-          'Programming Language :: Python :: 2.6',
-          'Programming Language :: Python :: 2.7',
           'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.2',
-          'Programming Language :: Python :: 3.3',
-          'Programming Language :: Python :: 3.4',
-          'Programming Language :: Python :: 3.5',
           'Programming Language :: Python :: 3.6',
+          'Programming Language :: Python :: 3.7',
+          'Programming Language :: Python :: 3.8',
+          'Programming Language :: Python :: 3.9',
+          'Programming Language :: Python :: 3.10',
       ],
+      python_requires='>=3.6',
 )

test/conftest.py

@@ -23,7 +23,7 @@
 def audiofile(request):
     """Fixture that provides an AudiofileSpec instance."""
     spec_path = os.path.join(DATADIR, request.param + '.json')
-    with open(spec_path, 'r') as f:
+    with open(spec_path) as f:
         spec = json.load(f)
     result = AudiofileSpec(**spec)
     return result

test/test_audioread.py

@@ -13,12 +13,6 @@
 # included in all copies or substantial portions of the Software.
 
 
-import json
-import os
-import sys
-
-import pytest
-
 import audioread
 
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py36
+envlist = py36,py37,py38,py39,py310
 
 [testenv]
 deps = pytest