Check the information for a python package

whichpy.fish

# ~/.config/fish/functions/whichpy.fish
function whichpy --description 'Print python package information'
    set -l whichpy_script_url "https://gist.githubusercontent.com/pwwang/879966128b0408c2459eb0a0b413fa69/raw/01fdd16e690a015aaa1015edf8874a6986bd33af/whichpy.py"
    set -l whichpy_script /tmp/whichpy.py
    if not test -f "$whichpy_script"
        echo "Downloading: $whichpy_script_url"
        command curl -sS "$whichpy_script_url" -o "$whichpy_script"
    end
    if test (count $argv) -eq 0
        echo "Usage: whichpy <package> [python]"
        return 1
    end
    if test (count $argv) -gt 1
        set python $argv[2]
    else
        set python "python"
    end
    echo "Running: $python $whichpy_script $argv[1]"
    command $python $whichpy_script $argv[1]
end

whichpy.py

import sys
import json
from urllib.request import urlopen
from datetime import datetime

try:
    im = __import__('importlib.metadata', fromlist=['metadata'])
    from importlib.metadata import distribution, packages_distributions  # noqa
except ImportError:
    im = __import__('importlib_metadata')

if len(sys.argv) < 2:
    print('Usage: %s <package>' % sys.argv[0])
    sys.exit(1)

pkg = sys.argv[1]
mdnames = []

for module, package in im.packages_distributions().items():
    if pkg in package:
        mdnames.append(module)

if distribution(pkg) and pkg not in mdnames:
    mdnames.append(pkg)

if mdnames:

    libs = {}
    for mdname in mdnames:
        try:
            libs[mdname] = __import__(mdname)
        except Exception:
            pass

    print()
    print('Python:')
    print('------')
    print(sys.executable)
    print(sys.version)
    print()
    print('Entry files:')
    print('--------------')
    for name, lib in libs.items():
        print(name, ":", lib.__file__)
    print()
    print('Version (importlib.metadata):')
    print('----------------------------')
    print(im.version(pkg))
    print()
    print('Version (__version__/version):')
    print('-----------------------------')
    for name, lib in libs.items():
        try:
            print(name, ":", lib.__version__)
        except AttributeError:
            try:
                print(name, ":", lib.version)
            except AttributeError:
                print(name, ":", 'N/A')

print()
print('Latest (PYPI):')
print('-------------')

url = f'https://pypi.python.org/pypi/{pkg}/json'
with urlopen(url) as req:
    try:
        status = req.status
    except AttributeError:
        status = req.code

    if status != 200:
        print('Failed to fetch.')
    else:
        def get_key(item):
            try:
                return datetime.fromisoformat(
                    item[1][0]['upload_time_iso_8601'].split('.')[0]
                )
            except Exception:
                return datetime.fromisoformat('1970-01-01T00:00:00')

        data = json.loads(req.read().decode())
        releases = data.get('releases', {})
        releases = sorted(
            releases.items(),
            reverse=True,
            key=get_key,
        )
        if not releases:
            print('N/A')
        else:
            print(releases[0][0])

Usage example:

$ whichpy pip
Downloading: https://gist.githubusercontent.com/pwwang/879966128b0408c2459eb0a0b413fa69/raw/4e3d29ffc580f62182f45f50d4feee3b58c6b633/whichpy.py
Running: python /tmp/whichpy.py pip

Python:
------
~/miniconda3/bin/python
3.10.9 | packaged by conda-forge | (main, Feb  2 2023, 20:20:04) [GCC 11.3.0]

Entry files:
--------------
pip : ~/miniconda3/lib/python3.10/site-packages/pip/__init__.py

Version (importlib.metadata):
----------------------------
22.3.1

Version (__version__/version):
-----------------------------
pip : 22.3.1

Latest (PYPI):
-------------
23.0.1