deepzoom-tile: Move worker shutdown to a helper function

Author: bgilbert

examples/deepzoom/deepzoom-tile.py

@@ -63,6 +63,7 @@ def __init__(self, slide, basename, format, tile_size, overlap, workers):
     def run(self):
         self._write_tiles()
         self._write_dzi()
+        self._shutdown()
 
     def _write_tiles(self):
         for level in xrange(self._dz.level_count):
@@ -77,9 +78,6 @@ def _write_tiles(self):
                     if not os.path.exists(tilename):
                         self._queue.put((level, (col, row), tilename))
                     self._tile_done()
-        for _i in range(self._workers):
-            self._queue.put(None)
-        self._queue.join()
 
     def _tile_done(self):
         self._processed += 1
@@ -93,6 +91,11 @@ def _write_dzi(self):
         with open('%s.dzi' % self._basename, 'w') as fh:
             fh.write(self._dz.get_dzi(self._format))
 
+    def _shutdown(self):
+        for _i in range(self._workers):
+            self._queue.put(None)
+        self._queue.join()
+
 
 if __name__ == '__main__':
     parser = OptionParser(usage='Usage: %prog [options] <slide>')