Qiita で一緒に使われた回数の多いタグを表示する関数 (Python 3.6)

related_tags.py

from collections import Counter
from math import ceil
import requests


class QiitaAPI:
    def __init__(self, base_url):
        self.base_url = base_url

    def __call__(self, url, params):
        return self.get(url, params)

    def get(self, url, params):
        url = self.base_url + url
        url += '?' + '&'.join(['='.join([k, str(v)])
                              for k, v in params.items()])
        return requests.get(url)


def related_tags(keyword, num=100):
    """Qiita で一緒に使われた回数の多いタグを表示
    Args:
        keyword (str): 検索するタグ名
        num     (int): 何件の記事を見るか
    """
    keyword = keyword.lower()

    api = QiitaAPI('http://qiita.com/api/v2')
    rs = [api(f'/tags/{keyword}/items',
              {'page': i + 1, 'per_page': num - i * 100})
          for i in range(ceil(num / 100))]
    data = [r.json() for r in rs if r.status_code == requests.codes.ok]
    tags = [tag['name'] for d in data
            for article in d for tag in article['tags']
            if tag['name'].lower() != keyword]
    tags = Counter(tags).most_common()

    print(*tags, sep='\n')

related_tags('swift')