File "/home/minh/.local/lib/python2.7/site-packages/AsyncLibrary/async.py", line 42, in wrapped_f
f = self._get_handler_from_keyword(keyword)
File "/home/minh/.local/lib/python2.7/site-packages/AsyncLibrary/async.py", line 34, in _get_handler_from_keyword
return EXECUTION_CONTEXTS.current.get_handler(keyword)
AttributeError: '_ExecutionContext' object has no attribute 'get_handler'