[Python-modules-team] Bug#949446: python3-ipython: Prevents sage fro starting, fails to import _baseclass_reprs

[Tobias Hansen]

Control: reassign -1 src:sagemath 8.9-3

Hi,

please wait for sagemath 9.0 with the bug reports. We know that sagemath 8.9 is broken at the moment for various reasons. For one it has to be patched to work with ipython 7 and there are several ongoing library transitions that break sagemath 8.9.

Best,
Tobias

On 1/21/20 12:11 AM, Amaury Pouly wrote:
> Package: python3-ipython
> Version: 7.11.1-1
> Severity: important
> 
> Dear Maintainer,
> 
> Sagemath is not usable on my system because of an import error. I am not sure if the issue
> lies with sage or with ipython. Here is the backtrace:
> 
> Traceback (most recent call last):
>   File "/usr/lib/python3.7/runpy.py", line 193, in _run_module_as_main
>     "__main__", mod_spec)
>   File "/usr/lib/python3.7/runpy.py", line 85, in _run_code
>     exec(code, run_globals)
>   File "/usr/lib/python3/dist-packages/sage/repl/ipython_kernel/__main__.py", line 3, in <module>
>     IPKernelApp.launch_instance(kernel_class=SageKernel)
>   File "/usr/lib/python3/dist-packages/traitlets/config/application.py", line 663, in launch_instance
>     app.initialize(argv)
>   File "<decorator-gen-124>", line 2, in initialize
>   File "/usr/lib/python3/dist-packages/traitlets/config/application.py", line 87, in catch_config_error
>     return method(app, *args, **kwargs)
>   File "/usr/lib/python3/dist-packages/ipykernel/kernelapp.py", line 542, in initialize
>     self.init_kernel()
>   File "/usr/lib/python3/dist-packages/ipykernel/kernelapp.py", line 447, in init_kernel
>     user_ns=self.user_ns,
>   File "/usr/lib/python3/dist-packages/traitlets/config/configurable.py", line 412, in instance
>     inst = cls(*args, **kwargs)
>   File "/usr/lib/python3/dist-packages/sage/repl/ipython_kernel/kernel.py", line 51, in __init__
>     super(SageKernel, self).__init__(**kwds)
>   File "/usr/lib/python3/dist-packages/ipykernel/ipkernel.py", line 68, in __init__
>     kernel      = self,
>   File "/usr/lib/python3/dist-packages/traitlets/config/configurable.py", line 412, in instance
>     inst = cls(*args, **kwargs)
>   File "/usr/lib/python3/dist-packages/IPython/core/interactiveshell.py", line 683, in __init__
>     self.init_display_formatter()
>   File "/usr/lib/python3/dist-packages/sage/repl/interpreter.py", line 231, in init_display_formatter
>     backend.get_display_manager().switch_backend(backend, shell=self)
>   File "/usr/lib/python3/dist-packages/sage/repl/rich_output/display_manager.py", line 322, in switch_backend
>     self._backend.install(**kwds)
>   File "/usr/lib/python3/dist-packages/sage/repl/rich_output/backend_ipython.py", line 59, in install
>     from sage.repl.display.formatter import SageDisplayFormatter
>   File "/usr/lib/python3/dist-packages/sage/repl/display/formatter.py", line 66, in <module>
>     from sage.repl.display.pretty_print import SagePrettyPrinter
>   File "/usr/lib/python3/dist-packages/sage/repl/display/pretty_print.py", line 29, in <module>
>     from sage.repl.display.fancy_repr import *
>   File "/usr/lib/python3/dist-packages/sage/repl/display/fancy_repr.py", line 17, in <module>
>     from IPython.lib.pretty import (
> ImportError: cannot import name '_baseclass_reprs' from 'IPython.lib.pretty' (/usr/lib/python3/dist-packages/IPython/lib/pretty.py)
> 
> -- System Information:
> Debian Release: bullseye/sid
>   APT prefers unstable
>   APT policy: (500, 'unstable')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
> 
> Kernel: Linux 5.4.2-amdmp2 (SMP w/8 CPU cores)
> Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
> Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=fr (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
> 
> Versions of packages python3-ipython depends on:
> ii  python3                 3.7.5-3
> ii  python3-backcall        0.1.0-2
> ii  python3-decorator       4.3.0-1.1
> ii  python3-jedi            0.15.2-1
> ii  python3-pexpect         4.6.0-1
> ii  python3-pickleshare     0.7.5-1
> ii  python3-pkg-resources   44.0.0-1
> ii  python3-prompt-toolkit  2.0.10-2
> ii  python3-pygments        2.3.1+dfsg-1
> ii  python3-traitlets       4.3.3-2
> 
> python3-ipython recommends no packages.
> 
> python3-ipython suggests no packages.
> 
> -- no debconf information
>