Update thread-local singleton example

examples/providers/singleton_thread_locals.py

@@ -25,12 +25,13 @@ example = providers.DelegatedCallable(example,
 thread_factory = providers.Factory(threading.Thread,
                                    target=example)
 
+if __name__ == '__main__':
     # Create 10 threads for concurrent execution of example():
     threads = []
     for thread_number in xrange(10):
         threads.append(thread_factory(name='Thread{0}'.format(thread_number)))
 
-# Start execution of all create threads:
+    # Start execution of all created threads:
     for thread in threads:
         thread.start()
 
@@ -45,5 +46,5 @@ while not queue().empty():
         all_objects.add(queue().get())
 
     assert len(all_objects) == len(threads)
-# Queue contains same number of objects as number of threads where thread-local
-# singleton provider was used.
+    # Queue contains same number of objects as number of threads where
+    # thread-local singleton provider was used.