Скачать или смотреть Automating Dynamically Loaded Web Pages with Selenium in Python

Discover how to effectively automate dynamically loaded webpages using Selenium in Python. Learn about explicit waits and techniques to handle issues with locating elements.
---
This video is based on the question https://stackoverflow.com/q/66966821/ asked by the user 'Mr. 0xCa7' ( https://stackoverflow.com/u/13897768/ ) and on the answer https://stackoverflow.com/a/67093525/ provided by the user 'KunduK' ( https://stackoverflow.com/u/10885684/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to automate dynamically loaded webpage with Selenium in Python

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Automating Dynamically Loaded Web Pages with Selenium in Python

Automation can be a remarkable boon for simplifying repetitive tasks, especially on web applications. However, things can get tricky when it comes to dynamically loaded web pages – those pages that load elements asynchronously, often through JavaScript. If you’re facing issues with automating these types of pages using Selenium in Python, you’re not alone. In this guide, we'll discuss how to tackle the challenges associated with dynamically loaded web pages and how to implement a solution effectively.

The Challenge

Imagine you're trying to automate actions on a webpage that loads various elements via JavaScript (asynchronous loading). While using Selenium, you might encounter difficulties with your script being unable to locate the elements you need to interact with. When executing your script, you may receive errors indicating that certain elements are not found, even though they are visible when loading the page in a standard web browser.

This is a common scenario for many developers working with automation scripts. The inconsistency between what is visible in the browser and what your Selenium script can see may arise from the timing of how elements load onto the page.

Understanding the Solution

To address these problems, you can use explicit waits in Selenium. Explicit waits are designed to pause the execution of your script until a specific condition is met – in this case, the visibility of the element you're trying to interact with.

Key Concepts of Explicit Waits

WebDriverWait: This class helps you set an explicit wait time and provide a condition to wait for an element.

Expected Conditions: A set of conditions provided by Selenium that you can wait for, such as element visibility or element presence.

Implementing Explicit Waits in Your Script

To implement this solution in your Python script, follow these steps:

Import Necessary Libraries: You need to import the required libraries which can help with implementing the explicit waits.

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

Use WebDriverWait: Identify the elements you wish to wait for using their CSS selectors and implement the wait as shown below.

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

Adjust Your Script: Modify the sections of your script where you're trying to locate elements by adding waits before those lines.

Complete Example

Here’s how your modified test code might look with explicit waits:

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

Conclusion

By making use of explicit waits in Selenium, you can effectively automate tasks on dynamically loaded web pages. This approach allows you to ensure that your scripts wait for web elements to be fully rendered before attempting interactions, thus eliminating the frustration of encountering NoSuchElementExceptions during execution. Now, you can take on dynamic web page automation confidently!

Happy coding!