check doctest result

test/scripts/run_doctest.py

@@ -12,4 +12,5 @@ import labelstower
 labelstower.bp.db = SQLAlchemy(app)
 
 import doctest
-print(doctest.testmod(labelstower.getter,verbose=True))
+(failure_count, test_count) = doctest.testmod(labelstower.getter,verbose=True)
+failure_count == 0