Python Coding challenge - Day 933| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Context Manager Class

class Safe:

A class named Safe is defined.

This class is intended to be used as a context manager with 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("open")

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

It prints "open".

3. Defining the __exit__ Method

    def __exit__(self, t, v, tb):

        print("close")

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

It receives:

t → exception type

v → exception value

tb → traceback

It prints "close".

It does NOT return True, so the exception is not suppressed.

4. Entering the with Block

with Safe():

What happens internally:

Python creates a Safe() object.

Calls __enter__() → prints "open".

Enters the block.

5. Executing Code Inside the with Block

    print(10/0)

10 / 0 raises a ZeroDivisionError.

Before Python crashes, it calls __exit__().

6. Exiting the with Block

__exit__(ZeroDivisionError, error_value, traceback)

__exit__() prints "close".

Because it returns None (which is treated as False), Python re-raises the exception.

7. Final Output

open

close

Then Python raises:

ZeroDivisionError: division by zero

Final Answer

✔ Output printed before crash:

open

close

100 Python Programs for Beginner with explanation