Web Scraping: how to extract this kind of div tag?

You can't because the div isn't there when you send a GET request to get the page code.

That page is built using Angular framework which produce SPA(Single Page Application) which means you can't scrape data from it when you send a GET request because the data isn't there. The data is being generated by Javascript code which needs to run first to add the required data to the webpage.

You need to use another way that allows Javascript code to run first then you try to get the data you want.

try this please

message = soup.find("div", _class="text-msg-container")

If you want to find class text-msg-container, try Selenium. It will find any locator easily.

import unittest    
from selenium import webdriver
    
    class PythonSearch(unittest.TestCase):
    
        def setUp(self):
            self.driver = webdriver.Firefox()
    
        def test_search(self):
            driver = self.driver
            driver.get("http://www.yoursite.com")
            elem = driver.find_element_by_css_selector(".text-msg-container")
    
        def tearDown(self):
            self.driver.close()
    
    if __name__ == "__main__":
        unittest.main()

Use driver = webdriver.Chrome('/path/to/chromedriver') if you are testing Chrome. Look here for more info https://chromedriver.chromium.org/getting-started . Getting started for Selenium https://selenium-python.readthedocs.io/getting-started.html#simple-usage

i hope that works

from selenium import webdriver

path = "C:/chromedriver.exe"    ### path to downloaded chromedriver on your 
                                #pc change this directory or put the same location C:

driver = webdriver.Chrome(path) ## your browser change it if you are not using chrome 
driver.get("website link")

out = driver.find_element_by_class_name("text-msg-container")
print(out.text)