setup.py

import setuptools
from glob import glob


with open("README.md", "r", encoding="utf-8") as s:
    long_description = s.read()

# ---------- Check if opencv-contrib is already installed ------------
opencv_installed = False
try:
    import re

    import pkg_resources

    installed_packages = {d.project_name: d.version for d in pkg_resources.working_set}
    for pkg, ver in installed_packages.items():
        matched = re.match("opencv-contrib", pkg, re.IGNORECASE)
        if matched:
            min_ver = 4.5
            max_ver = 5.0
            this_ver = int(ver.split(".")[0])
            if min_ver < this_ver < max_ver:
                opencv_installed = True
            else:
                opencv_installed = False
except Exception as e:
    print("There was an exception, but I skipped it\n", e)


package_list = [
    "numpy>=1.0",
    "tifffile>=2020.0",
    "pandas>=1.0",
    "dask>=2020.0",
    "scikit-learn>=1.0",
    "scikit-image>=0.19",
    "pint>=0.19.2",
]
if not opencv_installed:
    package_list.append("opencv-contrib-python>=4.5,<5.0")

# -------------------

setuptools.setup(
    name="microaligner",
    version="1.0.0",
    packages=setuptools.find_packages(),
    url="",
    platforms=["any"],
    classifiers=[
        "Programming Language :: Python :: 3",
        "Development Status :: 5 - Production/Stable",
        "Intended Audience :: Science/Research",
        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
        "Operating System :: OS Independent",
        "Topic :: Scientific/Engineering :: Image Processing",
    ],
    license="GPLv3",
    author="Vasyl Vaskivskyi",
    author_email="vaskivskyi.v@gmail.com",
    project_urls={
        "Source Code": "https://github.com/VasylVaskivskyi/microaligner",
    },
    description="MicroAligner: image registration for large scale microscopy",
    long_description=long_description,
    long_description_content_type="text/markdown",
    python_requires=">=3.7",
    install_requires=package_list,
    data_files=[("metadata", ["CITATION.cff", "environment.yaml"] + glob("config_examples/*.yaml"))],
    entry_points={"console_scripts": ["microaligner = microaligner.__main__:main"]},
)