You want to write a context manager that counts how many times the block inside with runs and prints the count after all uses. Which approach correctly implements this behavior?

hard📝 Application Q15 of 15

Python - Context Managers

You want to write a context manager that counts how many times the block inside with runs and prints the count after all uses. Which approach correctly implements this behavior?

AUse a class with instance variable counting and print in __enter__.

BUse a function with yield and print count after the yield.

CUse a class with a class variable to count entries and print in __exit__.

DUse a function that returns a list of counts each time it's called.

Step-by-Step Solution

Solution:

Step 1: Understand the requirement to count multiple uses
Counting how many times the block runs requires storing count across instances, so a class variable is needed.
Step 2: Identify where to print the count
Printing after all uses means printing in __exit__ after each block ends. Using a class variable allows accumulation.
Step 3: Evaluate options
Use a class with a class variable to count entries and print in __exit__. uses a class variable and prints in __exit__, matching the requirement. Use a function with yield and print count after the yield. is a generator but doesn't accumulate count across uses. Use a class with instance variable counting and print in __enter__. uses instance variable, which resets each time. Use a function that returns a list of counts each time it's called. is unrelated to context managers.
Final Answer:
Use a class with a class variable to count entries and print in __exit__. -> Option C
Quick Check:
Class variable + __exit__ print = A [OK]

Quick Trick: Use class variable to track count across with blocks [OK]

Common Mistakes:

Using instance variables that reset each time
Printing count too early in __enter__
Confusing generator functions with context managers

Master "Context Managers" in Python

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More Python Quizzes

You want to write a context manager that counts how many times the block inside with runs and prints the count after all uses. Which approach correctly implements this behavior?

Step 1: Understand the requirement to count multiple uses

Step 2: Identify where to print the count

Step 3: Evaluate options

Final Answer:

Quick Check:

Want More Practice?