Why when i run my program display this error message 'NoneType' object has no attribute ' find ' from bs4 import BeautifulSoup as soup import validators import requests def main(): url = '' while...

Why when i run my program display this error message

'NoneType' object has no attribute 'find'

from bs4 import BeautifulSoup as soup
import validators
import requests




def main():
    url = ''
    while validators.url(url) != True:
        url = input("Enter valid URL: ")
    url = 'https://blog.python.org/'
    filename = url[7:15]+'.txt'


    try:
        print("Downloading text from:", url)
        print("Saving text to:", filename)
        imported_webpage = getWebPage(url)
        while True:
            choice = input("Do you want to view raw Html? (y/n): ")
            if choice[0].lower() == 'y':
                print("### Raw HTML ###")
                print(imported_webpage)
                print("### End of Raw HTML ###")
                break
            elif choice[0].lower() == 'n':
                break
            else:
                print("Invalid Input. Enter valid Input.")
        poem = extractPoem(imported_webpage)
        exportFile(poem, filename)
        print("Page Saved. Re-importing file")
        poem_content = importFile(filename)
        print("Displaying File content:")
        print(poem_content)
    except Exception as e:
        print(e)




def getWebPage(url):
    page_html = requests.get(url)
    page_soup = soup(page_html.text, "html.parser")
    return page_soup




def extractPoem(page_soup):
    found = page_soup.find("div", {"class": "python"})
    # poem = "\n".join(line.strip() for line in found.python.text.split("\n"))
    poem = "\n".join(line.strip() for line in found.find('python').text.split("\n"))
    #poem = "\n".join(line.strip() for line in found.find('python').text.split("\n"))
    return poem




def exportFile(content, filename):
    with open(filename, 'w') as f:
        f.write(content)




def importFile(filename):
    with open(filename, 'r') as f:
        content = f.read()
    return content




if __name__ == "__main__":
    main()