Software Testing Test Development selenium NoSuchDriverException problem solved

We sometimes encounter this when we use Selenium for web automation testingnosuchdriverexceptionThis exception is usually caused by the webdriver not being able to find the specified browser driver. In this post, we will discussnosuchdriverexceptionReasons and how to fix this.

nosuchdriverexceptionis an anomalous class in selenium, which represents:webdriverThe specified driver could not be found. This is usually caused by the driver path setting incorrectly, the driver version not matching the browser version, or the driver not initializing correctly.

The driver path is set incorrectly

When we start the browser, Selenium needs to know where the browser driver is. If the path is set incorrectly, it will resultnosuchdriverexception。Make sure our driver path is correct.

from selenium import webdriver Set the Chrome driver path driver path ="path/to/chromedriver"driver = webdriver.chrome(executable_path=driver_path)

Because the Chrome browser is automatically updated, it is often the case that our browser driver version lags behind the browser version, so we need to check if our driver version matches the browser.

The driver is not initialized correctly

In some cases, you may need to set some additional parameters or options to initialize the driver correctly. For example, Chrome may require settings--no-sandboxOptions.

from selenium import webdriveroptions = webdriver.chromeoptions()options.add_argument('--no-sandbox')driver = webdriver.chrome(options=options)

The latest version of Selenium may have some unstable or unknown problems, we try to avoid installing the latest versions of the library, and recommend installing a more stable version.

Update your browser drivers

If our driver doesn't match the new browser version, we can update our driver and change the chromedriver** address to the new one.

Check the path settings

Check that the driver path is set correctly. Use absolute or relative paths, making sure that the slashes or backslashes in the path are correct.

Add the necessary options and parameters

When initializing the webdriver, add the necessary options and parameters as needed. For example, you may need to add some options to bypass some security settings when using the Chrome browser.

Use WebDriverManager

usewebdrivermanagerDriver management can be simplified by automatically setting up a driver that matches your browser version. Installationwebdrivermanagerand use it to initializewebdriver。** Below:

from selenium import webdriverfrom webdriver_manager.chrome import chromedrivermanagerdriver = webdriver.chrome(chromedrivermanager().install())

from selenium import webdriverfrom webdriver_manager.chrome import chromedrivermanagertry: Initialize chrome webdriver driver driver = webdriver. with webdrivermanagerchrome(chromedrivermanager().install()) to open a web page. finally: Shut down webdriver if driver: driverquit()

If none of the above works, we need to downgrade the selenium version to fix the issue, it is recommended to install 46.0, the command is as follows:

pip install selenium==4.6.0