I was able to get a bit further in python by running:

>>> from sage.structure import *

Then when I tried

>>> from sage.manifolds import manifold

I get an exception whose traceback ends with

AttributeError: module 'sage.structure' has no attribute 'sage_object'

This seems strange, since there is no exception when I run

>>> from sage.structure import sage_object
>>> dir(sage_object)
['LazyImport', 'SageObject', '__all__', '__builtins__', '__doc__', 
'__file__', '__loader__', '__name__', '__package__', '__spec__', 
'_base_dumps', '_base_save', '_interface_init_with_interface', 'dumps', 
'load', 'loads', 'make_None', 'register_unpickle_override', 'save', 
'unpickle_all', 'unpickle_global', 'unpickle_override']

But it seems consistent with:

>>> dir(sage.structure)
['__builtins__', '__cached__', '__doc__', '__file__', '__loader__', 
'__name__', '__package__', '__path__', '__spec__', 'category_object', 
'coerce', 'coerce_actions', 'coerce_dict', 'coerce_exceptions', 
'coerce_maps', 'dynamic_class', 'element', 'parent', 'richcmp', 'sage', 
'unique_representation']

I suppose there is some opaque monkey-patching going on.  So, I am not sure 
where to go next ...

- Marc

On Saturday, January 15, 2022 at 4:49:42 PM UTC-6 matthia...@gmail.com 
wrote:

> Hi Marc,
> Awesome! I've added it to 
> https://wiki.sagemath.org/ReleaseTours/sage-9.5#Binaries
> Matthias
>
> On Saturday, January 15, 2022 at 2:30:08 PM UTC-8 marc....@gmail.com 
> wrote:
>
>> Hi Matthias,
>>
>> I have posted binary releases for 9.5.rc1 on macOS with Intel or Arm CPUs 
>> at https://github.com/3-manifolds/Sage_macOS/releases/tag/v1.3-rc1.  
>> There are two separate disk images.  You may recall that I do not use 
>> Homebrew or Conda, but I did have to use an experimental binary release of 
>> gfortran for M1 since I was not able to build the gfortran spkg.
>>
>> - Marc
>>
>> On Saturday, January 15, 2022 at 3:01:14 PM UTC-6 matthia...@gmail.com 
>> wrote:
>>
>>> Based on the runs on GH Actions, I have updated the summary of platform 
>>> support in https://wiki.sagemath.org/ReleaseTours/sage-9.5#Sources
>>>
>>> TL;DR: It's all good now on all platforms tested on GH Actions, 
>>> including Cygwin.
>>> But I would urge that 9.5 still merge the positively reviews tickets 
>>> marked "critical"/"blocker", such as 
>>> https://trac.sagemath.org/ticket/29285 (which fixes the build in the 
>>> presence of pyenv).
>>> Also *note we have absolutely no automatic testing for the Apple 
>>> Silicon (M1) platform.* So it would be good if users/developers who 
>>> have access to this platform test the release candidate.
>>>
>>>
>>>
>>> On Friday, January 14, 2022 at 8:14:13 AM UTC-8 Matthias Köppe wrote:
>>>
>>>> On Thursday, January 13, 2022 at 3:22:03 PM UTC-8 Volker Braun wrote:
>>>>
>>>>> As always, you can get the latest beta version from the "develop" git 
>>>>> branch. Alternatively, the self-contained source tarball is at 
>>>>> http://www.sagemath.org/download-latest.html
>>>>>
>>>>> 3da1b22c25 (HEAD -> develop, tag: 9.5.rc1, trac/develop) Updated 
>>>>> SageMath version to 9.5.rc1
>>>>>
>>>>
>>>> Thanks for the new rc. Tests are running at 
>>>> https://github.com/sagemath/sage/actions/runs/1690315877 (Linux, 
>>>> macOS) and https://github.com/sagemath/sage/actions/runs/1690315874 
>>>> (Cygwin).
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>  
>>>>
>>>

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