Handle exceptions in update

main.py

@@ -50,7 +50,7 @@ def get_supported_sample_rates(pyaudio_device: int,
 class AudioAnalyzer:
     frame_queue = None   # type: queue.Queue
 
-    _hanning_window = None
+    _hann_window = None
     _fft_buffer = None
     _fft_lock = None
     _stream = None
@@ -90,7 +90,7 @@ class AudioAnalyzer:
 
         self._sample_rate = sample_rate
         self._samples_per_buffer = samples_per_buffer
-        self._hanning_window = (1 - numpy.cos(numpy.linspace(0, 2 * pi, samples_per_fft, False))) / 2
+        self._hann_window = (1 - numpy.cos(numpy.linspace(0, 2 * pi, samples_per_fft, False))) / 2
         self._fft_freqs = numpy.fft.fftfreq(samples_per_fft, 1 / sample_rate)
         self._fft_buffer = numpy.zeros(num_buffers * samples_per_buffer, dtype=numpy.float32)
         self.stop = False
@@ -128,15 +128,14 @@ class AudioAnalyzer:
                time_info: Dict,
                status_flags,
                ):
-        #TODO deal with exceptions happening in the callback!
-
+        try:
             in_buffer = numpy.fromstring(in_data, numpy.int16)
             samples_per_buffer = in_buffer.size
 
             with self._fft_lock:
                 self._fft_buffer[:-samples_per_buffer] = self._fft_buffer[samples_per_buffer:]
                 self._fft_buffer[-samples_per_buffer:] = in_buffer
-            fft = numpy.fft.rfft(self._fft_buffer * self._hanning_window)
+                fft = numpy.fft.rfft(self._fft_buffer * self._hann_window)
 
             fft_argmax = numpy.abs(fft[1:]).argmax() + 1         # excluding 0-frequency
             frame_data = {
@@ -154,9 +153,9 @@ class AudioAnalyzer:
 
             if self.stop:
                 return None, pyaudio.paComplete
-        else:
             return None, pyaudio.paContinue
-
+        except:
+            self.close()
 
 
 def monitor_pitch(pyaudio_device: int,