requirements.txt 中的依赖关系描述

Question

I've been given a large requirements.txt file with ~130 dependencies, half of which I don't recognise.

Is there an easy way to get a short desciption of each dependency without having to look each one up myself in the CheeseShop ?

Answer 1

It turns out that you can get info (including a summary and the latest version ) directly from pypi.org as JSON:

http://pypi.org/pypi/<package_name>/json

This is working for me:

#!/usr/bin/env python3
import json
import sys
from urllib import request
from urllib.error import HTTPError

filename = 'requirements.txt' if len(sys.argv) == 1 else sys.argv[1]

with open(filename, 'r') as f:
    for line in f:
        package = line.split('=', 1)[0].rstrip()
        # remove any version info given after '>' or '<'
        package = package.split('<')[0].split('>')[0]

        if not package: continue

        url = 'https://pypi.org/pypi/{}/json'.format(package)
        try:
            with request.urlopen(url.format(package)) as url:
                data = json.loads(url.read().decode())
                summary = data['info']['summary']
                version = data['info']['version']
        except:  # e.g. HTTPError:
            summary = 'error'
            version = ''

        print('{} ({}): {}'.format(line.rstrip(), version, summary))