Hi Carla,

The last stable release of ytree is incompatible with yt-4.x. You'll need to install ytree from source for the time being. However, I'll be releasing ytree 3.0 on August 1st (spoiler!). After that, the ytree and yt release versions will play nicely again. Let me know if you have issues with the ytree source install.

Britton

On Tue, Jul 27, 2021 at 3:46 PM C Bernhardt <bernhardt.phd@gmail.com> wrote:

Hello yt users,

I am having the exact same issues as was reported 1.5 years ago (see https://github.com/ytree-project/ytree/issues/44) in that ytree does not import because of yt.extern.six. I see this was resolved back then, but I am just now experiencing this issue. This happened after I installed yt 4.0.1. Here is my output:

>>>import ytree

/users/carla/.local/lib/python3.8/site-packages/yt/utilities/logger.py:4: VisibleDeprecationWarning: The configuration file /users/carla/.config/yt/ytrc is deprecated in favor of /users/carla/.config/yt/yt.toml. Currently, both are present. Please manually remove the deprecated one to silence this warning.

Deprecated since v4.0.0. This feature will be removed in v4.1.0

  from yt.config import ytcfg

>>> import ytree

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  File "/opt/apps/pkgs/cpython/3.8.9/intel64/intel_2019.2/lib/python3.8/site-packages/ytree/__init__.py", line 16, in <module>

    from ytree.data_structures import \

  File "/opt/apps/pkgs/cpython/3.8.9/intel64/intel_2019.2/lib/python3.8/site-packages/ytree/data_structures/__init__.py", line 16, in <module>

    from ytree.data_structures.arbor import \

  File "/opt/apps/pkgs/cpython/3.8.9/intel64/intel_2019.2/lib/python3.8/site-packages/ytree/data_structures/arbor.py", line 23, in <module>

    from yt.extern.six import \

ModuleNotFoundError: No module named 'yt.extern'

Please let me know how I can get around this. 

Thanks in advance,

--

Carla Bernhardt

PhD Student

Universität Heidelberg

ZAH Institut für Theoretische Astrophysik

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