python Multithreading

Thread a light task or small task of the application
Every thread is separate independent part of the same application
Threads exist inside a process.Multiple threads can exist in a single process
Executing more than one thread simultaneously is called multithreading
Threads allow a program to run multiple operations concurrently in the same process space.

one process one thread
one process multiple threads
multiple processes one thread per process
multiple processes multiple threads per process

process:

thread:

in python two way to create thread

threading module
thread module(Deprecated)

in pyhton if you class extends Thread class now your class became thread class

import threading
class MyThreadClass(threading.Thread):
    def run(self):
        for i in range(1,3):
            print(i)
t1 = MyThreadClass()
t1.start()
t2 = MyThreadClass()
t2.start()
t3 = MyThreadClass()
t3.start()

import threading
class MyThreadClass:
    def display(self):
        for i in range(3):
            print(i)
    
t1=threading.Thread(target=MyThreadClass().display)
t1.start()
t2=threading.Thread(target=MyThreadClass().display)
t2.start()
t3=threading.Thread(target=MyThreadClass().display)
t3.start()
t4=threading.Thread(target=MyThreadClass().display)
t4.start()

import threading
class MyThreadClass:
    def display(self,num):
        for i in range(num):
            print(i)
t1=threading.Thread(target=MyThreadClass().display,args=(3,))
t1.start()
t2=threading.Thread(target=MyThreadClass().display,args=(3,))
t2.start()
t3=threading.Thread(target=MyThreadClass().display,args=(3,))
t3.start()
t4=threading.Thread(target=MyThreadClass().display,args=(3,))
t4.start()

import threading
def print_square(num):
	print(num*num)
def print_cube(num):
	print(num*num*num)
#create thread	
t1=threading.Thread(target=print_square,args=(2,))
#starts the thread
t1.start()

#create thread
t2=threading.Thread(target=print_square,args=(3,))
#starts the thread
t2.start()

4
9

without using module name in

from threading import Thread
def print_square(num):
	print(num*num)
def print_cube(num):
	print(num*num*num)
#create thread	
t1=Thread(target=print_square,args=(2,))
#starts the thread
t1.start()

#create thread
t2=Thread(target=print_square,args=(3,))
#starts the thread
t2.start()

4
9

from threading import Thread
def print_square(num):
	for i in range(num):
	    print(i)
def print_cube(num):
	for j in range(num):
	    print(j)
#create thread	
t1=Thread(target=print_square,args=(3,))
#starts the thread
t1.start()

#create thread
t2=Thread(target=print_square,args=(3,))
#starts the thread
t2.start()