AttributeError: 'ResultSet' object has no attribute 'find_all'
<p>Where is error? I want to parse my text without tags.</p>

<pre><code>from bs4 import BeautifulSoup       
import re
import urllib.request
f = urllib.request.urlopen("http://www.championat.com/football/news-2442480-orlov-zenit-obespokoen---pole-na-novom-stadione-mozhet-byt-nekachestvennym.html")

soup = BeautifulSoup(f, 'html.parser')

soup=soup.find_all('div', class_="text-decor article__contain")

invalid_tags = ['b', 'i', 'u', 'br', 'a']

for tag in invalid_tags: 

  for match in soup.find_all(tag):

        match.replaceWithChildren()

soup = ''.join(map(str, soup.contents))

print (soup)
</code></pre>

<p>Error:</p>

<pre><code>Traceback (most recent call last):
  File "1.py", line 9, in &lt;module&gt;
    for match in soup.find_all(tag):
AttributeError: 'ResultSet' object has no attribute 'find_all'
</code></pre>