How to check if a pip package exists in certain given custom index?

Question

I've to check whether a package exists in the given index-url (authenticated) using python script.

For example:

I've to check if package package-1 exists in index https://mytestdomain.com/pypi/pypi/simple/

Is there any method to achieve this?

What I've tried?

I've tried the cli method, like configuring pip.conf with the above index-url and using pip download <package_name>

Answer 1

Use subprocess.run with the --no-deps and --dry-run options:

import subprocess, sys

def check_exists(package_name: str, index_url: str = "https://pypi.org/simple") -> bool:
    return not subprocess.run(
        [
            sys.executable,
            "-m",
            "pip",
            "install",
            "--dry-run",
            "--no-deps",
            "--index-url",
            index_url,
            package_namee,
        ],
        capture_output=True,
    ).returncode