Traceback (most recent call last):


 "<string>", line 1, in <module>


 "/tmp/env/local/lib/python2.7/site-packages/setuptools/__init__.py", line 12, in <module>

import setuptools.version


 "/tmp/env/local/lib/python2.7/site-packages/setuptools/version.py", line 1, in <module>

import pkg_resources


 "/tmp/env/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 72, in <module>

import packaging.requirements


 "/tmp/env/local/lib/python2.7/site-packages/packaging/requirements.py", line 59, in <module>

MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
TypeError: __call__() takes exactly 2 arguments (1 given)

Traceback (most recent call last):


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/tornado/ioloop.py", line 743, in _run_callback

ret = callback()


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/tornado/ioloop.py", line 767, in _discard_future_result

future.result()


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/nanny.py", line 390, in _on_exit

await self.scheduler.unregister(address=self.worker_address)


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/core.py", line 757, in send_recv_from_rpc

result = await send_recv(comm=comm, op=key, **kwargs)


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/core.py", line 556, in send_recv

raise exc.with_traceback(tb)


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/core.py", line 408, in handle_comm

result = handler(comm, **msg)


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/scheduler.py", line 2135, in remove_worker

address = self.coerce_address(address)


 "/home/george.trojan/miniconda3/envs/python-3.7/lib/python3.7/site-packages/distributed/scheduler.py", line 4844, in coerce_address

raise TypeError("addresses should be strings or tuples, got %r" % (addr,))
TypeError: addresses should be strings or tuples, got None
