Threading in python

from threading import Thread
from time import sleep

def threaded_function(arg):
    for i in range(arg):
        print("running")
        sleep(1)


if __name__ == "__main__":
    thread = Thread(target = threaded_function, args = (10, ))
    thread.start()
    thread.join()
    print("thread finished...exiting")

Source: stackoverflow.com

import threading
import time

def thread_function(name):
     print(f"Thread {name}: starting")
     time.sleep(2)
     print(f"Thread {name}: finishing")
 
my_thread = threading.Thread(target=thread_function, args=(1,))
my_thread.start()
time.sleep(1)
my_second_thread = threading.Thread(target=thread_function, args=(2,))
my_second_thread.start()
my_second_thread.join() # Wait until thread finishes to exit

# Python program to illustrate the concept
# of threading
# importing the threading module
import threading
  
def print_cube(num):
    """
    function to print cube of given num
    """
    print("Cube: {}".format(num * num * num))
  
def print_square(num):
    """
    function to print square of given num
    """
    print("Square: {}".format(num * num))
  
if __name__ == "__main__":
    # creating thread
    t1 = threading.Thread(target=print_square, args=(10,))
    t2 = threading.Thread(target=print_cube, args=(10,))
  
    # starting thread 1
    t1.start()
    # starting thread 2
    t2.start()
  
    # wait until thread 1 is completely executed
    t1.join()
    # wait until thread 2 is completely executed
    t2.join()
  
    # both threads completely executed
    print("Done!")

Source: geeksforgeeks.org

import threading
from random import randint
from time import sleep


def print_number(number):

    # Sleeps a random 1 to 10 seconds
    rand_int_var = randint(1, 10)
    sleep(rand_int_var)
    print "Thread " + str(number) + " slept for " + str(rand_int_var) + " seconds"

thread_list = []

for i in range(1, 10):

    # Instantiates the thread
    # (i) does not make a sequence, so (i,)
    t = threading.Thread(target=print_number, args=(i,))
    # Sticks the thread in a list so that it remains accessible
    thread_list.append(t)

# Starts threads
for thread in thread_list:
    thread.start()

# This blocks the calling thread until the thread whose join() method is called is terminated.
# From http://docs.python.org/2/library/threading.html#thread-objects
for thread in thread_list:
    thread.join()

# Demonstrates that the main process waited for threads to complete
print "Done"

Source: stackoverflow.com

#Python multithreading example to print current date.
#1. Define a subclass using threading.Thread class.
#2. Instantiate the subclass and trigger the thread.

import threading
import datetime

class myThread (threading.Thread):
    def __init__(self, name, counter):
        threading.Thread.__init__(self)
        self.threadID = counter
        self.name = name
        self.counter = counter
    def run(self):
        print("\nStarting " + self.name)
        print_date(self.name, self.counter)
        print("Exiting " + self.name)

def print_date(threadName, counter):
    datefields = []
    today = datetime.date.today()
    datefields.append(today)
    print("{}[{}]: {}".format( threadName, counter, datefields[0] ))

# Create new threads
thread1 = myThread("Thread", 1)
thread2 = myThread("Thread", 2)

# Start new Threads
thread1.start()
thread2.start()

thread1.join()
thread2.join()
print("\nExiting the Program!!!")

Source: techbeamers.com

new_thread = Thread(target=fn,args=args_tuple)
Code language: Python (python)

Source: pythontutorial.net

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