Can't create client on python 3.4.8

I’ve installed the latest versions of dask and distributed using pip. I’m trying to run the simples code sample:

from dask.distributed import Client
client = Client()

and I get the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.4/site-packages/distributed/client.py", line 578, in __init__
    self.start(timeout=timeout)
  File "/usr/lib/python3.4/site-packages/distributed/client.py", line 698, in start
    sync(self.loop, self._start, **kwargs)
  File "/usr/lib/python3.4/site-packages/distributed/utils.py", line 253, in sync
    six.reraise(*error[0])
  File "/usr/lib/python3.4/site-packages/six.py", line 693, in reraise
    raise value
  File "/usr/lib/python3.4/site-packages/distributed/utils.py", line 238, in f
    result[0] = yield make_coro()
  File "/usr/lib/python3.4/site-packages/distributed/utils.py", line 220, in make_coro
    coro = gen.maybe_future(func(*args, **kwargs))
  File "/usr/lib64/python3.4/site-packages/tornado/gen.py", line 335, in wrapper
    runner = Runner(result, future, yielded)
  File "/usr/lib64/python3.4/site-packages/tornado/gen.py", line 1044, in __init__
    if self.handle_yield(first_yielded):
  File "/usr/lib64/python3.4/site-packages/tornado/gen.py", line 1187, in handle_yield
    self.future = convert_yielded(yielded)
  File "/usr/lib64/python3.4/functools.py", line 727, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
  File "/usr/lib64/python3.4/site-packages/tornado/gen.py", line 1327, in convert_yielded
    return _wrap_awaitable(yielded)
  File "/usr/lib64/python3.4/asyncio/tasks.py", line 553, in ensure_future
    raise TypeError('A Future, a coroutine or an awaitable is required')
TypeError: A Future, a coroutine or an awaitable is required

Perhaps it has something to do with my python version, as I have no problem when I install dask with conda together with python 3.6

[mrocklin]

For what it’s worth the distibuted scheduler doesn’t explicitly provide support or test against Python 3.4, which we’ve found is rarely used.

On Mon, Jun 11, 2018 at 9:03 AM, Dmitriy Shashkin [e-mail] wrote:

I’ve installed the latest versions of dask and distributed using pip. I’m trying to run the simples code sample:

from dask.distributed import Client client = Client()

and I get the following error:

Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/usr/lib/python3.4/site-packages/distributed/client.py”, line 578, in init self.start(timeout=timeout) File “/usr/lib/python3.4/site-packages/distributed/client.py”, line 698, in start sync(self.loop, self._start, **kwargs) File “/usr/lib/python3.4/site-packages/distributed/utils.py”, line 253, in sync six.reraise(*error[0]) File “/usr/lib/python3.4/site-packages/six.py”, line 693, in reraise raise value File “/usr/lib/python3.4/site-packages/distributed/utils.py”, line 238, in f result[0] = yield make_coro() File “/usr/lib/python3.4/site-packages/distributed/utils.py”, line 220, in make_coro coro = gen.maybe_future(func(*args, **kwargs)) File “/usr/lib64/python3.4/site-packages/tornado/gen.py”, line 335, in wrapper runner = Runner(result, future, yielded) File “/usr/lib64/python3.4/site-packages/tornado/gen.py”, line 1044, in init if self.handle_yield(first_yielded): File “/usr/lib64/python3.4/site-packages/tornado/gen.py”, line 1187, in handle_yield self.future = convert_yielded(yielded) File “/usr/lib64/python3.4/functools.py”, line 727, in wrapper return dispatch(args[0].class)(*args, **kw) File “/usr/lib64/python3.4/site-packages/tornado/gen.py”, line 1327, in convert_yielded return _wrap_awaitable(yielded) File “/usr/lib64/python3.4/asyncio/tasks.py”, line 553, in ensure_future raise TypeError(‘A Future, a coroutine or an awaitable is required’) TypeError: A Future, a coroutine or an awaitable is required

Perhaps it has something to do with my python version, as I have no problem when I install dask with conda together with python 3.6

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[TomAugspurger]

This will become important when distributed goes python3 only, so that 2.7 people get the latest version that included 2.7 in the python_requires.