examples: fix Pyright errors

Author: mgeier

examples/play_file.py

@@ -80,6 +80,6 @@ def callback(outdata, frames, time, status):
     with stream:
         event.wait()  # Wait until playback is finished
 except KeyboardInterrupt:
-    parser.exit('\nInterrupted by user')
+    parser.exit(1, '\nInterrupted by user')
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/play_long_file.py

@@ -96,14 +96,14 @@ def callback(outdata, frames, time, status):
             callback=callback, finished_callback=event.set)
         with stream:
             timeout = args.blocksize * args.buffersize / f.samplerate
-            while len(data):
+            while len(data):  # type: ignore
                 data = f.read(args.blocksize)
                 q.put(data, timeout=timeout)
             event.wait()  # Wait until playback is finished
 except KeyboardInterrupt:
-    parser.exit('\nInterrupted by user')
+    parser.exit(1, '\nInterrupted by user')
 except queue.Full:
     # A timeout occurred, i.e. there was an error in the callback
     parser.exit(1)
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/play_long_file_raw.py

@@ -87,14 +87,14 @@ def callback(outdata, frames, time, status):
             callback=callback, finished_callback=event.set)
         with stream:
             timeout = args.blocksize * args.buffersize / f.samplerate
-            while data:
+            while data:  # type: ignore
                 data = f.buffer_read(args.blocksize, dtype='float32')
                 q.put(data, timeout=timeout)
             event.wait()  # Wait until playback is finished
 except KeyboardInterrupt:
-    parser.exit('\nInterrupted by user')
+    parser.exit(1, '\nInterrupted by user')
 except queue.Full:
     # A timeout occurred, i.e. there was an error in the callback
     parser.exit(1)
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/play_sine.py

@@ -59,6 +59,6 @@ def callback(outdata, frames, time, status):
         print('#' * 80)
         input()
 except KeyboardInterrupt:
-    parser.exit('')
+    parser.exit(1, '\nInterrupted by user')
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/play_stream.py

@@ -61,16 +61,16 @@ def int_or_str(text):
     info = ffmpeg.probe(args.url)
 except ffmpeg.Error as e:
     sys.stderr.buffer.write(e.stderr)
-    parser.exit(e)
+    parser.exit(1, str(e))
 
 streams = info.get('streams', [])
 if len(streams) != 1:
-    parser.exit('There must be exactly one stream available')
+    parser.exit(1, 'There must be exactly one stream available')
 
 stream = streams[0]
 
 if stream.get('codec_type') != 'audio':
-    parser.exit('The stream must be an audio stream')
+    parser.exit(1, 'The stream must be an audio stream')
 
 channels = stream['channels']
 samplerate = float(stream['sample_rate'])
@@ -117,9 +117,9 @@ def callback(outdata, frames, time, status):
         while True:
             q.put(process.stdout.read(read_size), timeout=timeout)
 except KeyboardInterrupt:
-    parser.exit('\nInterrupted by user')
+    parser.exit(1, '\nInterrupted by user')
 except queue.Full:
     # A timeout occurred, i.e. there was an error in the callback
     parser.exit(1)
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/plot_input.py

@@ -116,4 +116,4 @@ def update_plot(frame):
     with stream:
         plt.show()
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/rec_gui.py

@@ -12,7 +12,6 @@
 """
 import contextlib
 import queue
-import sys
 import tempfile
 import threading
 import tkinter as tk
@@ -76,8 +75,6 @@ def validate(self):
 
 class RecGui(tk.Tk):
 
-    stream = None
-
     def __init__(self):
         super().__init__()
 
@@ -123,7 +120,7 @@ def __init__(self):
         self.update_gui()
 
     def create_stream(self, device=None):
-        if self.stream is not None:
+        with contextlib.suppress(AttributeError):
             self.stream.close()
         self.stream = sd.InputStream(
             device=device, channels=1, callback=self.audio_callback)
@@ -206,7 +203,7 @@ def on_settings(self, *args):
     def init_buttons(self):
         self.rec_button['text'] = 'record'
         self.rec_button['command'] = self.on_rec
-        if self.stream:
+        if hasattr(self, 'stream'):
             self.rec_button['state'] = 'normal'
         self.settings_button['state'] = 'normal'
 

examples/rec_unlimited.py

@@ -83,4 +83,4 @@ def callback(indata, frames, time, status):
     print('\nRecording finished: ' + repr(args.filename))
     parser.exit(0)
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/spectrogram.py

@@ -32,7 +32,7 @@ def int_or_str(text):
     print(sd.query_devices())
     parser.exit(0)
 parser = argparse.ArgumentParser(
-    description=__doc__ + '\n\nSupported keys:' + usage_line,
+    description=__doc__ + '\n\nSupported keys:' + usage_line,  # type: ignore
     formatter_class=argparse.RawDescriptionHelpFormatter,
     parents=[parser])
 parser.add_argument(
@@ -106,6 +106,6 @@ def callback(indata, frames, time, status):
                           '\x1b[0m', sep='')
                     break
 except KeyboardInterrupt:
-    parser.exit('Interrupted by user')
+    parser.exit(1, '\nInterrupted by user')
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))

examples/wire.py

@@ -63,6 +63,6 @@ def callback(indata, outdata, frames, time, status):
         print('#' * 80)
         input()
 except KeyboardInterrupt:
-    parser.exit('')
+    parser.exit(1, '\nInterrupted by user')
 except Exception as e:
-    parser.exit(type(e).__name__ + ': ' + str(e))
+    parser.exit(1, type(e).__name__ + ': ' + str(e))