Use yield, add parentheses, fix indent

trackmultiplefaces.py

@@ -65,7 +65,7 @@ def count_cameras():
         if temp_camera.isOpened():
             temp_camera.release()
             continue
-        return i
+        yield i
 
 
 class facetracker:
@@ -614,16 +614,16 @@ class facetracker:
         return color
 
 if __name__ == '__main__':
-    for value in count_cameras:
+    for value in count_cameras():
         detectAndTrackMultipleFaces(
-                # Camera number
-                value,
-                # False: Names are directly printed on screen, no new thread
-                start_thread             = False,
-                # Select only names with letters and whitespace. Any other value will select printable.
-                charset                  = "letters",
-                # If True, then rectangle color around people' face will turn red if dangerous
-                draw_person_dangerosity  = True,
-                # Add a warning message if dangerous
-                add_warning_message      = True
-                )
+            # Camera number
+            value,
+            # False: Names are directly printed on screen, no new thread
+            start_thread             = False,
+            # Select only names with letters and whitespace. Any other value will select printable.
+            charset                  = "letters",
+            # If True, then rectangle color around people' face will turn red if dangerous
+            draw_person_dangerosity  = True,
+            # Add a warning message if dangerous
+            add_warning_message      = True
+        )