Upper limit for PuLP version < 2.8.0 seems to be required

[cosimolupo]

PROBLEM

When installing cobrawap via PyPI, the "undirect" PuLP dependency (i.e. not explicitly listed in the pyproject.toml file, but required by other listed dependencies) is not upper-bounded for what regards its versioning, and hence the latest version compatible with other packages is installed. As of today, the 2.9.0 version is retrieved and installed.

Unfortunately, when executing Cobrawap with Snakemake workflow manager, the following error occurs:

Traceback (most recent call last):
File "/path/to/working_dir/env_cobrawap/bin/snakemake", line 8, in <module>
sys.exit(main())
File "/path/to/working_dir/env_cobrawap/lib/python3.9/site-packages/snakemake/init.py", line 2736, in main
parser = get_argument_parser()
File "/path/to/working_dir/env_cobrawap/lib/python3.9/site-packages/snakemake/init.py", line 1607, in get_argument_parser
lp_solvers = pulp.list_solvers(onlyAvailable=True)
AttributeError: module 'pulp' has no attribute 'list_solvers'

The installed version of Snakemake is 7.32.4, as the versioning upper bound <8.0.0 is explicitly set.

PROPOSED SOLUTION

Manually downgrading PuLP to <2.8.0 solves the issue. Hence, a possible fix could to explicitly list PuLP dependency in the pyproject.toml file, and upper-bound its version to 2.7.x. When an upgrade of Snakemake version will be available (see also issue #57), then also the range allowed versions for PuLP can be reconsidered.

[rgutzen]

For reference, the corresponding issue in snakemake:
snakemake/snakemake#2607

[cosimolupo]

@rgutzen, indeed I found it, but forgot to link here. Thanks, it's useful to have it here.