Find element by ID in Selenium Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of finding an element by ID in Selenium?

Finding an element by ID helps locate a unique element on a web page quickly and reliably, as IDs are meant to be unique per page.

beginner

Which Selenium method is used to find an element by its ID in Python?

The method is driver.find_element(By.ID, 'element_id'), where By.ID specifies the locator strategy.

intermediate

Why is using ID locator preferred over other locators when possible?

Because IDs are unique and usually faster to locate, using them reduces test flakiness and improves performance.

beginner

Show a simple Python Selenium code snippet to find an element by ID and click it.

from selenium import webdriver
from selenium.webdriver.common.by import By

# Setup driver
driver = webdriver.Chrome()
driver.get('https://example.com')

# Find element by ID and click
button = driver.find_element(By.ID, 'submit-button')
button.click()

# Close driver
driver.quit()

intermediate

What happens if Selenium cannot find an element by the given ID?

Selenium raises a NoSuchElementException, indicating the element was not found on the page.

Which Selenium method finds an element by ID in Python?

A driver.find_element(By.ID, 'id_value')

B driver.find_element_by_id('id_value')

C driver.find_element(By.CLASS_NAME, 'id_value')

D driver.find_element(By.NAME, 'id_value')

The modern and recommended way is using driver.find_element(By.ID, 'id_value'). The older find_element_by_id is deprecated.

Why is the ID locator preferred in Selenium tests?

A Because IDs are unique and fast to locate

B Because IDs are always visible on the page

C Because IDs can locate multiple elements

D Because IDs are case-insensitive

IDs are unique per page and locating by ID is usually faster and more reliable.

What exception does Selenium raise if an element by ID is not found?

A InvalidSelectorException

B NoSuchElementException

C TimeoutException

D ElementNotVisibleException

If the element is not found, Selenium raises NoSuchElementException.

Which import is necessary to use By.ID in Selenium Python?

A from selenium.webdriver.chrome.service import Service

B from selenium.webdriver.common.keys import Keys

C from selenium.webdriver.support.ui import WebDriverWait

D from selenium.webdriver.common.by import By

The By class is imported from selenium.webdriver.common.by.

What is the correct way to click an element found by ID 'login'?

A driver.click_element('login')

B driver.find_element_by_id('login').submit()

C driver.find_element(By.ID, 'login').click()

D driver.find_element(By.CLASS_NAME, 'login').click()

You find the element by ID and then call click() on it.

Explain how to find an element by ID using Selenium in Python and why it is useful.

Think about the locator method and its advantages.

Describe what happens if Selenium cannot find an element by the given ID during test execution.

Consider error handling in Selenium tests.