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How can you update the value of an existing cookie named session to xyz789 in Selenium Python?

hard📝 Application Q9 of 15
Selenium Python - Advanced Patterns
How can you update the value of an existing cookie named session to xyz789 in Selenium Python?
ADirectly assign driver.cookies['session'] = 'xyz789'
BUse driver.update_cookie({'name': 'session', 'value': 'xyz789'})
CDelete the cookie first, then add a new cookie with the same name and new value
DCall driver.add_cookie({'name': 'session', 'value': 'xyz789'}) without deleting
Step-by-Step Solution
Solution:
  1. Step 1: Understand cookie update behavior

    Selenium does not have an update method; to change a cookie value, you must delete and then add it again.
  2. Step 2: Validate options

    Delete the cookie first, then add a new cookie with the same name and new value correctly deletes the old cookie and adds a new one with updated value. Options B and C are invalid methods. Call driver.add_cookie({'name': 'session', 'value': 'xyz789'}) without deleting may cause duplicate cookies or undefined behavior.
  3. Final Answer:

    Delete the cookie first, then add a new cookie with the same name and new value -> Option C
  4. Quick Check:

    Update cookie by delete + add [OK]
Quick Trick: Update cookie by deleting then adding new one [OK]
Common Mistakes:
  • Expecting update_cookie method
  • Directly assigning to driver.cookies dict
  • Adding cookie without deleting old one

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