[Python] Selenium + Python how to listen for change of element

The idea is to create a bot to read message from a chat, and all message are in a ul>li (not neccesary to write message), e.g

<ul class="message-list">
<li class="message">
Hello There
</li>
<li class="message">
Hello
</li>
</ul>


I found expected_conditions from Selenium, to handle if element exist/found, but it's always true, because there is a message but I don't want to continue the code if a message was already in chat, that's not the main idea. And after that, I found EventFiringWebDriver, AbstractEventListener and nothing.

from selenium import webdriver as wb
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support.events import EventFiringWebDriver, AbstractEventListener
from selenium.webdriver.common.keys import Keys


class MyListener(AbstractEventListener):
def before_navigate_to(self, url, driver):
print("Before navigate to %s" % url)

def after_navigate_to(self, url, driver):
print("After navigate to %s" % url)


driver = wb.Chrome('C:\python\selenium\chromedriver.exe')
wait = WebDriverWait(driver, 300)
# ef_driver = EventFiringWebDriver(driver, MyListener())
driver.implicitly_wait(15)
driver.get('https://socket.io/demos/chat/')
driver.switch_to.frame(driver.find_element_by_class_name('iframe-class'))
InputName = driver.find_element_by_xpath('/html/body/ul/li[2]/div/input')
InputName.send_keys('MyNameIsJeff')
InputName.send_keys(Keys.ENTER)

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