RuntimeError: cannot release un-acquired lock

[Victor-Chow]

When I try to import it ,print these:

RuntimeError Traceback (most recent call last)
~/env/lib/python3.5/importlib/_bootstrap.py in find_and_load(name, import)

~/env/lib/python3.5/importlib/_bootstrap.py in find_and_load_unlocked(name, import)

~/env/lib/python3.5/importlib/_bootstrap.py in _load_unlocked(spec)

~/env/lib/python3.5/importlib/_bootstrap_external.py in exec_module(self, module)

~/env/lib/python3.5/importlib/_bootstrap.py in _call_with_frames_removed(f, *args, **kwds)

~/env/lib/python3.5/site-packages/Proxies/init.py in ()
----> 1 from .Proxies import Proxies

~/env/lib/python3.5/importlib/_bootstrap.py in find_and_load(name, import)

~/env/lib/python3.5/importlib/_bootstrap.py in exit(self, *args, **kwargs)

~/env/lib/python3.5/importlib/_bootstrap.py in release(self)

RuntimeError: cannot release un-acquired lock

During handling of the above exception, another exception occurred:

RuntimeError Traceback (most recent call last)
in ()
----> 1 import Proxies

~/env/lib/python3.5/importlib/_bootstrap.py in find_and_load(name, import)

~/env/lib/python3.5/importlib/_bootstrap.py in exit(self, *args, **kwargs)

~/env/lib/python3.5/importlib/_bootstrap.py in release(self)

RuntimeError: cannot release un-acquired lock