How to author Python package using custom PyPI in setup.py?

Question

Let's say I have no internet, and a custom PyPI clone running at 10.0.0.2.

I want to be author a Python package that someone on my intranet can install. It has dependency X, which lives on my custom PyPI clone.

How can I author my package so that someone can install it, pulling in dependency X, without needing to apply any special pip configuration? That is, how can I author my package so that installing it pulls in custom PyPI dependencies? In this constraint, I only have access to edit the setup.py.

The context is that I am using a managed service that accepts a tar'd Python package with a setup.py file, and then runs pip to install everything. I don't have access to how pip is called, or any environmental config on that system.

Is there a way through setup.py alone to pull in packages from a custom IP address for a PyPI?

Answer 1

As far as I'm aware, you can't update the setup.py to point it to download dependencies from a specific server. However, the person that's executing the pip install can specify which server to use to look for the package and its dependencies with the -i flag like so

pip install -i http://localhost:8000 <package>

The dependencies can be specified in the setup.py, on the other hand. In setuptools.setup you can declare dependencies like so:

import sys

import setuptools

with open("README.md", "r") as fh:
    long_description = fh.read()

setuptools.setup(
    name="somepackage",
    version="0.0.1",
    author="Your Name",
    author_email="[email protected]",
    description="Some desc",
    long_description=long_description,
    long_description_content_type="text/markdown",
    packages=setuptools.find_packages(),
    classifiers=[
        "Programming Language :: Python :: 2.7",
        "Programming Language :: Python :: 3.8"
    ],
    install_requires=["dependency1", "dependency2"]
)