Bug#893783: spyder3: does not start even after --reset

[Jitse Niesen]

On 22/03/18 10:33, Nicola Manca wrote:
>
>          I tried to start spyder3 in buster but it does not run. I've tried both
> after the --reset flag and after deleting all the configuration files form my
> home folder.
>
> here the output I get:
> [...]
 >   File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 315, 
 > in make_current
>      assert asyncio is None
> AssertionError

Something similar got reported many times on the Spyder issue tracker; 
see e.g. https://github.com/spyder-ide/spyder/issues/6627 .

I don't know the root cause, but it seems to be an incompatibility 
between python-tornado and pyzmq and possibly jupyter-client, caused by 
a change in tornado version 5. Maybe pyzmq needs to be at least version 
17 to run with tornado version 5; the changelog at

    http://pyzmq.readthedocs.io/en/latest/changelog.html

notes that pyzmq 17.0.0 includes "Compatibility fixes with tornado 5.0.dev"

I hope this helps.

Jitse Niesen
(Spyder developer)