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Python Thread run() Method with Example

Python Thread.run() Method: In this tutorial, we will learn about the run() method of Thread class in Python with its usage, syntax, and examples. By Hritika Rajput Last updated : April 24, 2023

Python Thread.run() Method

The Thread.run() method is an inbuilt method of the Thread class of the threading module , it is used to represent a thread's activity. It calls the method expressed as the target argument in the Thread object along with the positional and keyword arguments taken from the args and kwargs arguments, respectively. This method can also be overridden in the subclass.

Module

The following module is required to use run() method:

import threading

Class

The following class is required to use run() method:

from threading import Thread

Syntax

The following is the syntax of run() method:

run()

Parameter(s)

The following are the parameter(s):

• None

Return Value

The return type of this method is <class 'NoneType'>, it returns nothing.

Example of Thread.run() Method in Python

# Python program to explain the
# use of run() method in Thread class

import threading

def thread_1(i):
    print('Value by Thread 1:', i)

def thread_2(i):
    print('Value by Thread 2:', i)

def thread_3(i):
    print('Value by Thread 3:', i)    

    
# Creating three sample threads 
thread1 = threading.Thread(target=thread_1, args=(1,))
thread2 = threading.Thread(target=thread_2, args=(2,))
thread3 = threading.Thread(target=thread_3, args=(3,))

# Running three thread object
thread1.run()
thread2.run()
thread3.run()

Output

Value by Thread 1: 1
Value by Thread 2: 2
Value by Thread 3: 3

run() method can also be overridden in the subclass. Given below creates a subclass of the Thread class and overrides the run function.

Example 2

# Python program to demonstrate 
# the overriding of run() method 

import threading 
  
class mythread(threading.Thread): 
    def __init__(self, thread_name, thread_ID): 
        threading.Thread.__init__(self) 
        self.thread_name = thread_name 
        self.thread_ID = thread_ID 
    
    # Overrriding of run() method in the subclass 
    def run(self): 
        print("Thread name: "+str(self.thread_name) +"  "+ "Thread id: "+str(self.thread_ID)); 
  
thread1 = mythread("thread1", 1) 
thread2 = mythread("thread2", 2); 
  
thread1.start() 
thread2.start() 

Output

Thread name: thread1  Thread id: 1
Thread name: thread2  Thread id: 2