[validation] How can I check if some text exist or not in the page using Selenium?

string_website.py

search string in webpage

    from selenium import webdriver
    from selenium.webdriver.common.keys import Keys
    browser = webdriver.Firefox()
    browser.get("https://www.python.org/")
    content=browser.page_source

    result = content.find('integrate systems')
    print ("Substring found at index:", result ) 

    if (result != -1): 
    print("Webpage OK")
    else: print("Webpage NOT OK")
    #print(content)
    browser.close()

run

python test_website.py
Substring found at index: 26722
Webpage OK


d:\tools>python test_website.py
Substring found at index: -1 ; -1 means nothing found
Webpage NOT OK

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