play_file example: make exception handling more idiomatic

Author: mgeier

examples/play_file.py

@@ -5,18 +5,17 @@
 
 """
 import argparse
-import sounddevice as sd
-import soundfile as sf
-import sys
 
 parser = argparse.ArgumentParser(description=__doc__)
 parser.add_argument("filename", help="audio file to be played back")
 parser.add_argument("-d", "--device", type=int, help="device ID")
 args = parser.parse_args()
 
 try:
+    import sounddevice as sd
+    import soundfile as sf
     data, fs = sf.read(args.filename, dtype='float32')
     sd.play(data, fs, device=args.device, blocking=True)
-except:
+except BaseException as e:
     # This avoids printing the traceback, especially if Ctrl-C is used.
-    sys.exit(sys.exc_info()[1])
+    raise SystemExit(str(e))