No module named 'cvxpy.reductions.dcp2cone.atom_canonicalizers'

[debackerl]

Hello,

Using both cvxpy-1.4.1 and cvxpy-1.4.2, trying to import dsp, I get this error:

File [~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/__init__.py:1](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/__init__.py:1)
----> [1](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/__init__.py:1) from dsp.cvxpy_integration import add_is_dsp, extend_cone_canon_methods
      [2](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/__init__.py:2) from dsp.local import LocalVariable
      [3](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/__init__.py:3) from dsp.problem import MinimizeMaximize, SaddlePointProblem, is_dsp

File [~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:2](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:2)
      [1](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:1) from cvxpy import Expression, Problem
----> [2](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:2) from cvxpy.reductions.dcp2cone.atom_canonicalizers import CANON_METHODS
      [4](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:4) from dsp.problem import is_dsp
      [5](https://vscode-remote+ssh-002dremote-002blaurent-002dworkstation-002elan-002eetive-002ecom.vscode-resource.vscode-cdn.net/home/laurent/code/market-downloader/~/mambaforge/envs/torch2/lib/python3.11/site-packages/dsp/cvxpy_integration.py:5) from dsp.saddle_extremum import conjugate, saddle_max, saddle_min

ModuleNotFoundError: No module named 'cvxpy.reductions.dcp2cone.atom_canonicalizers'

Looking at the code of CVXPY 1.3.2, I can indeed see the required symbol: https://github.com/cvxpy/cvxpy/blob/v1.3.2/cvxpy/reductions/dcp2cone/atom_canonicalizers/__init__.py

However, CVXPY 1.4.0, renamed it as https://github.com/cvxpy/cvxpy/blob/v1.4.0/cvxpy/reductions/dcp2cone/canonicalizers/__init__.py

[tonyjohnhhhh]

I think you'd better use cvxpy-1.3. Because I encountered this problem one month later. Although it seems that the writer had said that they solved this problem.
In cvxpy_integration.py. they tried to use this block so solve the problem
try:
from cvxpy.reductions.dcp2cone.canonicalizers import CANON_METHODS
except ModuleNotFoundError:
from cvxpy.reductions.dcp2cone.atom_canonicalizers import CANON_METHODS
I thought it is the right solution, but it did not work.

[phschiele]

Hi @debackerl @tonyjohnhhhh!
Thanks so much for raising this issue. We just released a new version to PyPI: https://pypi.org/project/dsp-cvxpy/
Can you try running pip install -U dsp-cvxpy to upgrade to version 0.2.0 and see if this fixes the issue?
Happy to answer other questions about the package!

[tonyjohnhhhh]

I think this new one works well! I am now using the cvxpy 1.4.2 and dsp-cvxpy 0.2.0, and it seems everything is fine. Thanks for your help!

[phschiele]

Great, closing this issue, feel free to open a new one if something comes up.