[Solved] You wrote this code to run tests on Selenium Grid but get a connection error: driver = webdriver.Remote(command_executor='http://localhost:5555/wd/hub', desired_capabilities={'browserName':... | Selenium Python

Selenium Python - Selenium Grid

You wrote this code to run tests on Selenium Grid but get a connection error:

driver = webdriver.Remote(command_executor='http://localhost:5555/wd/hub', desired_capabilities={'browserName': 'chrome'})

What is the most likely cause?

AThe Grid Hub is not running on port 5555

BThe browserName 'chrome' is invalid

Cwebdriver.Remote cannot be used with command_executor

DMissing import statement for webdriver

Step-by-Step Solution

Solution:

Step 1: Check connection details in command_executor
The URL uses port 5555, but Selenium Grid Hub usually runs on port 4444 by default.
Step 2: Identify common connection error causes
If the Hub is not running on port 5555, connection fails. Browser name 'chrome' is valid, webdriver.Remote supports command_executor, and imports are assumed correct.
Final Answer:
The Grid Hub is not running on port 5555 -> Option A
Quick Check:
Wrong Hub port causes connection error [OK]

Quick Trick: Check Hub URL and port carefully for connection errors [OK]

Common Mistakes:

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