Weird issue with peewee

[vwxyzjn]

I seem to have encountered a weird issue with peewee when running https://github.com/vwxyzjn/gym-microrts/blob/oai5/experiments/ppo_gridnet_oai5.py:

ne 3160, in execute_sql
    cursor.execute(sql, params or ())
peewee.OperationalError: database is locked
exception calling callback for <Future at 0x7f0ad459cf50 state=finished raised AssertionError>
Traceback (most recent call last):
  File "/environment/miniconda3/lib/python3.7/concurrent/futures/_base.py", line 324, in _invoke_callbacks
    callback(self)
  File "ppo_gridnet_oai5.py", line 275, in on_evaluation_done
    model_path, output_path = future.result()
  File "/environment/miniconda3/lib/python3.7/concurrent/futures/_base.py", line 428, in result
    return self.__get_result()
  File "/environment/miniconda3/lib/python3.7/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/environment/miniconda3/lib/python3.7/concurrent/futures/thread.py", line 57, in run  
    result = self.fn(*self.args, **self.kwargs)
  File "ppo_gridnet_oai5.py", line 257, in run_evaluation
    assert return_code == 0
AssertionError
SPS: 980

ran in a computer that didn't quite get the full trace...