Python Coding challenge - Day 1092| What is the output of the following Python Code?

 

Code Explanation:

1️⃣ Importing the Module

import threading

Explanation

Imports Python’s threading module.

Used to create and manage threads.

2️⃣ Defining the Function

def task():

Explanation

A function named task is defined.

This function will be executed inside a thread.

3️⃣ Function Body

print("X")

Explanation

When the thread runs, it prints:

X

4️⃣ Creating the Thread

t = threading.Thread(target=task)

Explanation

A thread object t is created.

target=task → thread will execute the task() function.

Thread is created but not started yet.

5️⃣ Starting the Thread

t.start()

Explanation

Starts the thread.

The thread executes task() and prints:

X

6️⃣ Waiting for Thread Completion

t.join()

Explanation

join() makes the main program wait until thread finishes.

Ensures that "X" is printed before moving forward.

7️⃣ Starting the Thread Again (ERROR)

t.start()

Explanation

This tries to start the same thread again.

❌ In Python, a thread can be started only once.

Once a thread finishes execution, it cannot be restarted.

❌ Runtime Error

RuntimeError: threads can only be started once

900 Days Python Coding Challenges with Explanation