from lxml import html

tree = html.fromstring(br.open(current_url).get_data())

if len(tree.xpath('//del[text()='some text']')) > 0:
    mydata['some text'] = 'text is deleted from the web page!'
else:
    mydata['some text'] = 'text is not deleted'

from selenium import webdriver

driver = webdriver.Chrome()
driver.get('https://www.mywebpage.co.uk')

a = driver.find_element_by_xpath('//del[text()="some text"]')

if len(driver.find_element_by_xpath('//del[text()="some text"]')) > 0:
    mydata['some text'] = 'text is deleted from the web page!'
else:
    mydata['some text'] = 'text is not deleted'