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

Recall & Review

beginner

What does the CSS selector div.content select?

It selects all <div> elements that have the class content.

beginner

How do you find a single element by CSS selector in Selenium with Python?

Use driver.find_element(By.CSS_SELECTOR, 'your_css_selector') to find the first matching element.

intermediate

What is the difference between find_element and find_elements in Selenium?

find_element returns the first matching element or throws an error if none found. find_elements returns a list of all matching elements, which can be empty.

intermediate

Why use CSS selectors instead of XPath in Selenium?

CSS selectors are often faster and simpler for common queries. They are also easier to read and write for styling-related selections.

beginner

Write a CSS selector to find all <a> elements inside a <nav> element.

The CSS selector is nav a. It selects all <a> elements that are inside any <nav> element.

Which Selenium method finds the first element matching a CSS selector?

A find_elements(By.CSS_SELECTOR, 'selector')

B find_element(By.CSS_SELECTOR, 'selector')

C find_element_by_xpath('selector')

D find_elements_by_tag_name('selector')

The method find_element(By.CSS_SELECTOR, 'selector') returns the first element matching the CSS selector.

What does the CSS selector #main .item select?

A Elements with id 'main' inside class 'item'

B All elements with id 'main' and class 'item'

C Elements with class 'item' inside an element with id 'main'

D Elements with class 'main' and id 'item'

The selector #main .item selects elements with class 'item' that are descendants of the element with id 'main'.

If no element matches the CSS selector in find_element, what happens?

A Returns None

B Returns an empty list

C Returns False

D Throws a NoSuchElementException error

If no element matches, find_element throws a NoSuchElementException.

Which CSS selector matches all <input> elements with type 'text'?

A input[type='text']

B input.text

C input#text

D input::text

The selector input[type='text'] matches all <input> elements with attribute type equal to 'text'.

How do you find multiple elements by CSS selector in Selenium?

A driver.find_elements(By.CSS_SELECTOR, 'selector')

B driver.find_element(By.CSS_SELECTOR, 'selector')

C driver.find_elements_by_xpath('selector')

D driver.find_element_by_tag_name('selector')

Use find_elements(By.CSS_SELECTOR, 'selector') to get a list of all matching elements.

Explain how to find an element by CSS selector using Selenium in Python.

Think about the Selenium method and parameters.

Describe the difference between find_element and find_elements when using CSS selectors in Selenium.

Focus on return types and error behavior.