Key combinations (key_down, key_up) in Selenium Python

Introduction

We use key combinations to simulate pressing multiple keys together, like Ctrl+C for copy. This helps test how web pages respond to keyboard shortcuts.

Testing if Ctrl+C copies text on a webpage.

Checking if Shift+Tab moves focus backward in a form.

Verifying keyboard shortcuts like Ctrl+S to save.

Simulating pressing Ctrl+Alt+Delete or other combos in web apps.

Testing accessibility features that rely on key combos.

Syntax

Selenium Python

from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.common.keys import Keys

# driver is your WebDriver instance
actions = ActionChains(driver)
actions.key_down(Keys.CONTROL).send_keys('a').key_up(Keys.CONTROL).perform()

Use key_down() to press and hold a key.

Use key_up() to release the key.

Examples

This types 'HELLO' by holding Shift while typing.

Selenium Python

actions.key_down(Keys.SHIFT).send_keys('hello').key_up(Keys.SHIFT).perform()

This simulates pressing Ctrl+C to copy.

Selenium Python

actions.key_down(Keys.CONTROL).send_keys('c').key_up(Keys.CONTROL).perform()

This presses Alt+Shift+S together, then releases them.

Selenium Python

actions.key_down(Keys.ALT).key_down(Keys.SHIFT).send_keys('s').key_up(Keys.SHIFT).key_up(Keys.ALT).perform()

Sample Program

This script opens a test page with an input box, types 'hello world' with 'world' in uppercase by holding Shift, then selects all text and copies it using Ctrl+A and Ctrl+C key combinations.

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
from selenium.webdriver.common.keys import Keys
import time

# Setup WebDriver (using Chrome here)
driver = webdriver.Chrome()
driver.get('https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_input_test')

# Switch to iframe where input box is
iframe = driver.find_element('id', 'iframeResult')
driver.switch_to.frame(iframe)

input_box = driver.find_element('xpath', '//input[@type="text"]')
input_box.click()

actions = ActionChains(driver)

# Type lowercase 'hello'
actions.send_keys('hello ').perform()

# Hold Shift and type 'world' to get uppercase
actions.key_down(Keys.SHIFT).send_keys('world').key_up(Keys.SHIFT).perform()

# Wait to see result
print('Typed text in input box:')
print(input_box.get_attribute('value'))

# Clear input box
input_box.clear()

# Simulate Ctrl+A (select all) then Ctrl+C (copy)
actions.key_down(Keys.CONTROL).send_keys('a').key_up(Keys.CONTROL).perform()
actions.key_down(Keys.CONTROL).send_keys('c').key_up(Keys.CONTROL).perform()

print('Performed Ctrl+A and Ctrl+C key combinations.')

# Cleanup
time.sleep(2)
driver.quit()

Important Notes

Time complexity is not applicable as these are UI actions.

Always release keys with key_up() to avoid stuck keys in tests.

Use key combinations to test keyboard shortcuts and accessibility.

Summary

Use key_down() and key_up() to simulate pressing and releasing keys.

Combine with send_keys() to type while holding keys like Shift or Ctrl.

This helps test keyboard shortcuts and user interactions on web pages.