Python Coding challenge - Day 931| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Context Manager Class

class M:

A class named M is defined.

This class will be used as a context manager using the with statement.

A context manager must define:

__enter__() → what happens when entering the with block

__exit__() → what happens when exiting the with block

2. Defining the __enter__ Method

    def __enter__(self):

        print("in")

__enter__() is automatically called when the with block starts.

It prints "in".

3. Defining the __exit__ Method

    def __exit__(self, a, b, c):

        print("out")

        return True

__exit__() is automatically called when the with block ends.

It receives:

a → exception type

b → exception value

c → traceback

It prints "out".

Returning True tells Python that the exception is handled and should be suppressed.

4. Entering the with Block

with M():

What happens internally:

Python creates an object: M()

Calls __enter__() → prints "in"

Enters the block

5. Executing Code Inside with

    print(1/0)

1/0 raises a ZeroDivisionError

But before the program crashes, Python calls __exit__()

6. Handling the Exception in __exit__

__exit__(exception_type, exception_value, traceback)

__exit__() prints "out"

Returns True

This tells Python: "I handled the error — don’t propagate it"

So the exception is suppressed.

7. Final Output

in

out

The print(1/0) does not print anything because the exception occurs first.

The program does not crash because the exception was suppressed.

Final Answer

✔ Output:

in

out

500 Days Python Coding Challenges with Explanation