Hey Payal, use the code snippet shown below to perform mouse hover in Python with Selenium:
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
from time import sleep
driver = webdriver.Firefox()
driver.get("https://www.edureka.co")
action = ActionChains(driver);
parent_level_menu = driver.find_element_by_id("tabscathome")
action.move_to_element(parent_level_menu).perform()
child_level_menu = driver.find_element_by_xpath("//a[contains(text(),'DevOps')]")
child_level_menu.click();
sleep(10)
driver.close()
For further understanding, you can refer to the Selenium Course.