Скачать или смотреть Troubleshooting Selenium Python - How to Fix CLASS_NAME Not Found Errors

Learn how to resolve the common issue of `Selenium Python` failing to find elements using `CLASS_NAME`. Discover effective solutions and best practices for using `CSS_SELECTOR`.
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Troubleshooting Selenium Python - How to Fix CLASS_NAME Not Found Errors

When automating web applications with Selenium in Python, you may encounter various challenges, particularly when it comes to locating and interacting with elements on a webpage. One common issue that many beginners face is the inability to find elements using CLASS_NAME. This problem can leave you frustrated, especially when you get an error message indicating that the element could not be located. In this guide, we will break down the solution to this specific issue, so you can continue testing without interruption.

The Problem: Finding Elements by CLASS_NAME

Consider the following scenario: You are trying to click an SVG element represented by the following HTML:

[[See Video to Reveal this Text or Code Snippet]]

Your initial code to locate this element looks something like this:

[[See Video to Reveal this Text or Code Snippet]]

However, you encounter the following error:

[[See Video to Reveal this Text or Code Snippet]]

Understanding the Error

At first glance, it seems you are correctly trying to use CLASS_NAME. However, there are a couple of important things to note:

Spaces in Class Names: The CLASS_NAME locator in Selenium does not support multiple class names separated by spaces. When you specify "bi bi-x-circle", it interprets this as a single class name, which is not valid in CSS.

CSS Selectors vs. Class Names: The error message you see refers to css selector, indicating that the underlying issue stems from how the class names are being processed. For elements with multiple classes, you should use CSS_SELECTOR instead of CLASS_NAME.

The Solution: Using CSS_SELECTOR

Instead of using CLASS_NAME, you should utilize CSS_SELECTOR, which allows you to combine multiple class names appropriately. Here’s how you can update your code:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

WebDriverWait: This line waits certain conditions to be met before proceeding. In this case, it waits until the element is clickable.

CSS_SELECTOR: By specifying multiple class names, you separate them with a dot (.) to form the selector .bi.bi-x-circle.

Clicking the Element: Once the element is found, you simply call the click() method to interact with it, fulfilling your automation requirement.

Conclusion

Using CLASS_NAME in Selenium can lead to confusion when dealing with elements that have multiple classes. By opting for CSS_SELECTOR, you can accurately specify your selection criteria and avoid not found errors. This adjustment will help you streamline your automation efforts in Python using Selenium, ensuring your tests run smoothly and effectively.

If you encounter similar issues in the future, remember to verify your class name usage and consider switching to CSS selectors for elements with multiple classes. Happy testing!