You want to safely acquire and release a lock using automatic resource cleanup. Which code snippet correctly uses with for this purpose?

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Python - Context Managers

You want to safely acquire and release a lock using automatic resource cleanup. Which code snippet correctly uses with for this purpose?

import threading
lock = threading.Lock()

# Choose the correct usage
A) with lock.acquire():
       print('Lock acquired')
B) with lock.acquire:
       print('Lock acquired')
C) with lock:
       print('Lock acquired')
D) with lock.lock():
       print('Lock acquired')

Awith lock.acquire():

Bwith lock.acquire:

Cwith lock.lock():

Dwith lock:

Step-by-Step Solution

Solution:

Step 1: Understand lock context management
Python's threading.Lock supports the context manager protocol, so you can use with lock: to acquire and release automatically.
Step 2: Analyze options
with lock: uses with lock:, which is correct. Other options misuse the acquire method or call non-existent methods.
Final Answer:
with lock: -> Option D
Quick Check:
Use lock directly in with = with lock: [OK]

Quick Trick: Use 'with lock:' to auto acquire and release locks [OK]

Common Mistakes:

Calling lock.acquire() inside with
Using wrong method names
Not knowing Lock supports context manager

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You want to safely acquire and release a lock using automatic resource cleanup. Which code snippet correctly uses with for this purpose?

Step 1: Understand lock context management

Step 2: Analyze options

Final Answer:

Quick Check:

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