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

[Michael Biebl]

On Thu, 22 Mar 2018 10:47:17 +0000 Jitse Niesen <jitseniesen at yahoo.com>
wrote:

> 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"

The latest python-tornado upload contains:

 python-tornado (5.0.0-2) unstable; urgency=medium
 .
   [ Ondřej Nový ]
   * Add Breaks: python{,3}-zmq (<< 17) (Closes: #893360)

The result is, that spyder3 is currently not installable:

$ sudo apt install spyder3
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 spyder3 : Depends: python3-spyder (= 3.2.6+dfsg1-2) but it is not going
to be installed
E: Unable to correct problems, you have held broken packages.


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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