"ImportError: pyutilib.enum has been removed" When Running Pre-Built Model

[Zoltán Marić]

Problem description

I'm trying to run ./continental/example-model.yaml from the prebuilt models package on Ubuntu 20.04.4 LTS, but it seems it uses a version of pyomo that calls the removed module pyutilib.enum.

Steps to reproduce the problem

cd pre-built-euro-calliope-v1.0/
conda env create -f environment.yaml
conda activate euro-calliope
calliope run ./continental/example-model.yaml

Output:

Traceback (most recent call last):
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/bin/calliope", line 6, in <module>
    from calliope.cli import cli
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/__init__.py", line 3, in <module>
    from calliope import examples, exceptions
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/examples.py", line 14, in <module>
    from calliope.core.model import Model
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/core/__init__.py", line 1, in <module>
    from calliope.core.model import Model, read_netcdf
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/core/model.py", line 33, in <module>
    from calliope.backend.run import run as run_backend
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/backend/run.py", line 14, in <module>
    from calliope.backend.pyomo import model as run_pyomo
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/calliope/backend/pyomo/model.py", line 15, in <module>
    import pyomo.core as po  # pylint: disable=import-error
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/pyomo/core/__init__.py", line 11, in <module>
    from pyomo.core.expr import *
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/pyomo/core/expr/__init__.py", line 36, in <module>
    from .calculus.derivatives import differentiate
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/pyomo/core/expr/calculus/derivatives.py", line 3, in <module>
    from pyutilib.enum import Enum
  File "/home/zoltan/mambaforge/envs/euro-calliope-prebuilt/lib/python3.7/site-packages/pyutilib/enum/__init__.py", line 18, in <module>
    package) that supersedes this library.""")
ImportError: pyutilib.enum has been removed.

Python 3 now has an enum implementation in the standard library (also
available for older Python versions as the third-party enum34 PyPI
package) that supersedes this library.

Calliope version

0.6.5 - as defined in the environment.yaml of the pre-built package.
The pyomo version used is 5.6.8. Using 5.6.9 resulted in the same error, while 5.7 results in conflicting packages during environment creation.

[Zoltán Marić]

My apologies, this was in fact an issue for the euro-calliope project. I posted the issue there too (link), so I'll close this one.