Extracting class inside a div returns None in Python Beautifulsoup

The snippet below does not really display the intended data as it returns None. Any idea and inputs as how to do it properly will be very helpful.

from bs4 import BeautifulSoup
from urllib import request
from urllib.request import Request, urlopen

url = "https://bscscan.com/block/9478762"
headers = {"User-Agent": "Mozilla/5.0"}

req = Request(url, headers=headers)
html = urlopen(req).read()
soup = BeautifulSoup(html, "html.parser")

blockheight = soup.find('div', attrs={'class': 'font-weight-sm-bold mr-2'})
print ("Block Height: ", blockheight)

blocktimestamp = soup.find('div', attrs={'class': 'far fa-clock small mr-1'})
print ("Timestamp ",blocktimestamp)

blocktransactions = soup.find('div', class_ = 'u-label u-label--value u-label--primary rounded my-1')
print ("Transactions ", blocktransactions)

Current Output:

    Block Height:   None
    Timestamp:      None
    Transactions:   None

Wanted Output:

    Block Height:   9478762
    Timestamp:      Jul-25-2021 11:43:52 PM +UTC
    Transactions:   223 -> transactions https://bscscan.com/txs?block=9478762
                    37 -> contract internal transactions https://bscscan.com/txsInternal?block=9478762
    Validated by:   0xb218c5d6af1f979ac42bc68d98a5a0d796c6ab01

Answer

I hope this helps:

from bs4 import BeautifulSoup
from urllib import request
from urllib.request import Request, urlopen

url = "https://bscscan.com/block/9478762"
headers = {"User-Agent": "Mozilla/5.0"}

req = Request(url, headers=headers)
html = urlopen(req).read()
soup = BeautifulSoup(html, "html.parser")

blockheight = soup.find('span', attrs={'class': 'font-weight-sm-bold mr-2'}).contents[0]
print ("Block Height: ", str(blockheight).replace("n", ""))

blocktimestamp = soup.find('i', attrs={'class': 'far fa-clock small mr-1'}).next_sibling
print ("Timestamp: ",str(blocktimestamp).replace("n", ""))

blocktransactions = soup.find('a', class_ = 'u-label u-label--value u-label--primary rounded my-1').contents[0]
print ("Transactions: ", blocktransactions)

Output:

Block Height:   9478762
Timestamp:  2 hrs 35 mins ago (Jul-25-2021 11:43:52 PM +UTC) 
Transactions:  223 transactions