shuai

this is error message ``` Traceback (most recent call last): File "/home/gt/workspace/algo_syncer/base/async_pg.py", line 81, in loop.run_until_complete(run_query('SELECT 1')) File "/usr/lib/python3.6/asyncio/base_events.py", line 473, in run_until_complete return future.result() File "/home/gt/workspace/algo_syncer/base/async_pg.py", line 65, in...