Dependency on 'setuptools' is not declared

[greschd]

Before submitting the issue

• I have checked for Compatibility issues
• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

The pkg_resources module used here:
https://github.com/pyansys/pydpf-core/blob/5a92a48b4133592b02be7930b76e2112add8d03c/src/ansys/dpf/core/misc.py#L7

is provided by setuptools, but ansys-dpf-core does not list setuptools as a dependency. This causes failures in cases where setuptools isn't already installed.

Steps To Reproduce

• Create a clean virtualenv, activate it
• pip uninstall -y setuptools
• pip install ansys-dpf-core
• Try loading ansys.dpf.core

Exception:

>>> import ansys.dpf.core
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\tmp\myenv\lib\site-packages\ansys\dpf\core\__init__.py", line 23, in <module>
    from ansys.dpf.core.dpf_operator import Operator, Config
  File "D:\tmp\myenv\lib\site-packages\ansys\dpf\core\dpf_operator.py", line 15, in <module>
    from ansys.dpf.core.config import Config
  File "D:\tmp\myenv\lib\site-packages\ansys\dpf\core\config.py", line 10, in <module>
    from ansys.dpf.core import server as server_module
  File "D:\tmp\myenv\lib\site-packages\ansys\dpf\core\server.py", line 16, in <module>
    from ansys.dpf.core.misc import is_ubuntu, get_ansys_path
  File "D:\tmp\myenv\lib\site-packages\ansys\dpf\core\misc.py", line 7, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

Which Operating System are you using?

Windows

Which DPF/Ansys version are you using?

none (this issue occurs independent of the DPF server)

Which Python version are you using?

3.9

Installed packages

Package Version

---

ansys-dpf-core 0.7.2
ansys-dpf-gate 0.3.0
ansys-dpf-gatebin 0.3.0
ansys-grpc-dpf 0.7.0
cachetools 5.3.0
certifi 2022.12.7
charset-normalizer 3.0.1
colorama 0.4.6
google-api-core 2.11.0
google-api-python-client 2.76.0
google-auth 2.16.0
google-auth-httplib2 0.1.0
googleapis-common-protos 1.58.0
grpcio 1.51.1
httplib2 0.21.0
idna 3.4
numpy 1.23.5
packaging 23.0
pip 21.1.3
protobuf 4.21.12
psutil 5.9.4
pyasn1 0.4.8
pyasn1-modules 0.2.8
pyparsing 3.0.9
requests 2.28.2
rsa 4.9
six 1.16.0
tqdm 4.64.1
uritemplate 4.1.1
urllib3 1.26.14

[greschd]

Possible resolution: add setuptools to the explicit list of dependencies.

Found via a build failure in pydpf-composites, with a dependency update that drops the direct dependency on setuptools: https://github.com/pyansys/pydpf-composites/actions/runs/4102239446/jobs/7074952191