import json
import urllib.request
from pprint import pp


def get_qiita_user_url(username):
    if not isinstance(username, str):
        raise TypeError()
    return f"https://qiita.com/api/v2/users/{username}"


def fetch_qiita_user(username):
    url = get_qiita_user_url(username)
    with urllib.request.urlopen(url) as f:
        return json.load(f)


def get_qiita_useritems_url(username, page, per_page):
    if not isinstance(username, str):
        raise TypeError()
    if not isinstance(page, int) or not isinstance(per_page, int):
        raise TypeError()
    if not (1 <= page <= 100) or not (1 <= per_page <= 100):
        raise ValueError()
    return f"https://qiita.com/api/v2/users/{username}/items?page={page}&per_page={per_page}"


def fetch_qiita_useritems(username, page, per_page):
    url = get_qiita_useritems_url(username, page, per_page)
    with urllib.request.urlopen(url) as f:
        return json.load(f)


def fetch_qiita_userallitems(username):
    userinfo = fetch_qiita_user(username)
    itemcount = userinfo["items_count"]
    useritems = []
    for page in range(1, 100):
        fetched = (page - 1) * 100
        if fetched > itemcount:
            break
        useritems.extend(fetch_qiita_useritems(username, page, 100))
        page += 1
    return useritems


#Geben Sie vorerst Ihren Benutzernamen an
username = "katabamisan"
useritems = fetch_qiita_userallitems(username)
titles = [entry["title"] for entry in useritems]
pp(titles)

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