Парсер

import re
from bs4 import BeautifulSoup
 
pattern = re.compile(r"/catalog/1/1/3/r+")
html = """
<ul>
    <li>
        <a href="/catalog/1/1/3/r1">Раздел 1</a>
    </li>
    <li>
        <a href="/catalog/1/1/3/r2">Раздел 2</a>
    </li>
    <li>
        <a href="/catalog/1/1/3/r3">Раздел 3</a>
    </li>
    <li>
        <a href="/catalog/1/1/3/r4">Раздел 4</a>
    </li>
</ul>
"""
bs4 = BeautifulSoup(html, "html.parser")
links = bs4.find_all("a", href=pattern)
for links in links:
    print(links["href"])

from builtins import print
import requests
import pygame
import os
import sys
import binascii
from pygame.locals import *
import shutil
import bs4
from bs4 import BeautifulSoup
from urllib.request import urlopen
import time
from smtplib import SMTP_SSL
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import  encoders
import lxml.html
import sqlite3
import urllib
url='http://htmlbook.ru/samhtml5/ustarevshie-tegi-i-atributy/'
def get_html(url):
    f = myhtml = urlopen(url)
    sp = BeautifulSoup(myhtml, "html.parser")
    lnk=sp.find_all("span",class_="tag")
    for l in lnk:
        l=str(l)
        l=l.replace('"',' ')
        l=l.replace("<span class= tag >",'')
        l=l.replace('</span>',' ')
        l=l.replace('&gt','')
        l=l.replace('&lt','')
        l=l.replace(';',' ')
        print(l)
 
if __name__ == '__main__':
    get_html(url)