Performance metrics collection in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start performance logging in Selenium.

Selenium Python

driver = webdriver.Chrome()
driver.[1]('performance')

Drag options to blanks, or click blank then click option'

Astart_log

Bstart_performance_logging

Cenable_performance

Dbegin_logging

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method that does not exist like start_performance_logging.

Using enable_performance which is not a valid method.

The correct method to start performance logging is start_log('performance').

2fill in blank

medium

Complete the code to retrieve performance logs from the driver.

Selenium Python

logs = driver.get_log('[1]')

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Abrowser

Bdriver

Cperformance

Dnetwork

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'browser' or 'network' which are different log types.

Using 'driver' which is not a valid log type.

To get performance logs, use get_log('performance').

3fill in blank

hard

Fix the error in the code to correctly parse performance logs.

Selenium Python

for entry in logs:
    message = json.loads(entry['[1]'])
    print(message)

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Alog

Bmessage

CmessageText

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'messageText' or 'log' which do not exist in the log entry.

Using 'message' with wrong capitalization.

The correct key to access the JSON string in each log entry is 'message'.

4fill in blank

hard

Fill both blanks to filter performance logs for network events.

Selenium Python

network_events = [entry for entry in logs if '[1]' in json.loads(entry['message'])['[2]']]

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ANetwork.responseReceived

Bmethod

Cparams

DNetwork.requestWillBeSent

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'params' instead of 'method' as the key.

Using 'Network.requestWillBeSent' which is a different event.

Filter logs where 'method' key equals 'Network.responseReceived' to get network events.

5fill in blank

hard

Fill all three blanks to extract URL, status, and timing from network response logs.

Selenium Python

for event in network_events:
    msg = json.loads(event['[1]'])
    url = msg['[2]']['response']['url']
    status = msg['[3]']['response']['status']
    print(f"URL: {url}, Status: {status}")

Drag options to blanks, or click blank then click option'

Amessage

Bparams

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'message' or 'params' inconsistently causing key errors.

Confusing the keys for JSON parsing.

The JSON string is under 'message', and the event details are under 'params'.