解析时出现 Requests.exceptions.InvalidSchema 错误

我正在编写一个应该通过所有链接 en.wikipedia.org Category:Animals_alphabetically ( https://ru.wikipedia.org/w/index.php?title=Category:Animals_alphabetically&from=А ) 的代码，但是在网站上链接不会更改数字（.../page = 1..），并且 pagefrom=Azov+button（链接取决于页面上的第一个动物）。因此，有必要走更艰难的路。

代码算法如下：

1. 从按钮中获取链接 # 该站点有一个“下一页”按钮。
2. 按照链接
3. 重复
4. 停在最后一个链接（我自己开的）

import  requests
from bs4 import BeautifulSoup


def parser(url):
    html = requests.get(url).text
    soup = BeautifulSoup(html,'html.parser')
    return soup

    
def parser_next_link():
    soup = parser(url)
    result_a = soup.find_all('a',{'title':'Категория:Животные по алфавиту'})
    for i in result_a:
        if i.get_text() == 'Следующая страница':
            link = 'ru.wikipedia.org/' + i.get('href')
            # Нам нужна, только первая ссылка т.к. вторая её дублирует
            break
    return link


wiki_link = ['https://ru.wikipedia.org/w/index.php?title=Категория:Животные_по_алфавиту&subcatfrom=0&filefrom=0&pageuntil=Азовская+пуголовка#mw-pages']

for i in wiki_link:
    url = i 
    wiki_link.append(parser_next_link())
    # Последняя страница 
    if url == 'https://ru.wikipedia.org/w/index.php?title=Категория:Животные_по_алфавиту&pagefrom=Zabrus&subcatfrom=0&filefrom=0#mw-pages':
        break

输出：

Traceback (most recent call last):
  File "c:\Project_Py\test_2.py", line 26, in <module>
    wiki_link.append(parser_next_link())
  File "c:\Project_Py\test_2.py", line 12, in parser_next_link
    soup = parser(url)
  File "c:\Project_Py\test_2.py", line 6, in parser
    html = requests.get(url).text
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 649, in send
    adapter = self.get_adapter(url=request.url)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 742, in get_adapter
    raise InvalidSchema("No connection adapters were found for {!r}".format(url))
requests.exceptions.InvalidSchema: No connection adapters were found for 'ru.wikipedia.org//w/index.php?title=%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%96%D0%B8%D0%B2%D0%BE%D1%82%D0%BD%D1%8B%D0%B5_%D0%BF%D0%BE_%D0%B0%D0%BB%D1%84%D0%B0%D0%B2%D0%B8%D1%82%D1%83&pagefrom=%D0%90%D0%B7%D0%BE%D0%B2%D1%81%D0%BA%D0%B0%D1%8F+%D0%BF%D1%83%D0%B3%D0%BE%D0%BB%D0%BE%D0%B2%D0%BA%D0%B0&subcatfrom=%D0%90&filefrom=%D0%90#mw-pages'
PS C:\Project_Py> & C:/Users/Владелец/AppData/Local/Microsoft/WindowsApps/PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0/python.exe c:/Project_Py/test_2.py
Traceback (most recent call last):
  File "c:\Project_Py\test_2.py", line 26, in <module>        
    wiki_link.append(parser_next_link())
  File "c:\Project_Py\test_2.py", line 12, in parser_next_link
    soup = parser(url)
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 649, in sendbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 649, in send                                                                      bz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", line 742, in get_adapter
    adapter = self.get_adapter(url=request.url)
  File "C:\Users\Владелец\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_q.org//w/index.php?title=%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%96%D0%B8%D0%B2%D0%BE%D1%82%D0%BD%D1%8bz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\requests\sessions.py", lD0%B7%D0%BE%D0%B2%D1%81%D0%BA%D0%B0%D1%8F+%D0%BF%D1%83%D0%B3%D0%BE%D0%BB%D0%BE%D0%B2%D0%BA%D0%B0&subcatfrom=%D0%90&filefine 742, in get_adapter
    raise InvalidSchema("No connection adapters were found for {!r}".format(url))     
requests.exceptions.InvalidSchema: No connection adapters were found for 'ru.wikipedia.org//w/index.php?title=%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%96%D0%B8%D0%B2%D0%BE%D1%82%D0%BD%D1%8B%D0%B5_%D0%BF%D0%BE_%D0%B0%D0%BB%D1%84%D0%B0%D0%B2%D0%B8%D1%82%D1%83&pagefrom=%D0%90%D0%B7%D0%BE%D0%B2%D1%81%D0%BA%D0%B0%D1%8F+%D0%BF%D1%83%D0%B3%D0%BE%D0%BB%D0%BE%D0%B2%D0%BA%D0%B0&subcatfrom=%D0%90&filefrom=%D0%90#mw-pages'

我意识到错误是递归的，但我也有一个停止条件。