Fixed shebangs, added error checking

samples/python2/camshift.py

@@ -1,4 +1,4 @@
-#/usr/bin/env python
+#!/usr/bin/env python
 
 '''
 Camshift tracker
@@ -24,6 +24,8 @@ Keys:
 
 import numpy as np
 import cv2
+
+# local module
 import video
 
 
@@ -98,8 +100,10 @@ class App(object):
 
                 if self.show_backproj:
                     vis[:] = prob[...,np.newaxis]
-                try: cv2.ellipse(vis, track_box, (0, 0, 255), 2)
-                except: print track_box
+                try:
+                    cv2.ellipse(vis, track_box, (0, 0, 255), 2)
+                except: 
+                    print track_box
 
             cv2.imshow('camshift', vis)
 
@@ -113,8 +117,10 @@ class App(object):
 
 if __name__ == '__main__':
     import sys
-    try: video_src = sys.argv[1]
-    except: video_src = 0
+    try:
+        video_src = sys.argv[1]
+    except: 
+        video_src = 0
     print __doc__
     App(video_src).run()