Python Material - Part - 28 - Multi_Threading

 __author__ = "Narendra Boyina"

# -----------------------------------------------------------------------------
# Copyright (c) 2025 BR Technologies PVT LTD
# -----------------------------------------------------------------------------
"""
Topics to be covered in today's class:
--> How to import thread module with examples 

"""

"""
Threading in python is used to run multiple threads (tasks/ function calls) at the same time. 
Note that this does not mean that they are executed on different CPUs.
"""
from time import time, sleep
# import time


def sqaure(list):
    for number in list:
        # time.sleep(0.2)   # hold the execution for 2 milli seconds
        sleep(0.2)  # hold the execution for 2 milli seconds
        print("sqare of {0} is {1}".format(number, number**2))


def cube(list):
    for number in list:
        # time.sleep(0.2)   # hold the execution for 2 milli seconds
        sleep(0.2)  # hold the execution for 2 milli seconds
        print("Cube of {0} is {1}".format(number, number*number*number))
        # print("Cube of {0} is {1}".format(number, number**3))

#
# start_time = time() # takes the current system time
# print(start_time)
# list = [1, 2, 3, 4]
# sqaure(list)
# cube(list)
# print(time()-start_time)  # aproximately 1.62

"""
Output:

1539772873.8303847
sqare of 1 is 1
sqare of 2 is 4
sqare of 3 is 9
sqare of 4 is 16
Cube of 1 is 1
Cube of 2 is 8
Cube of 3 is 27
Cube of 4 is 64
1539772875.4356406
1.6052558422088623
"""

from threading import Thread


def sqaure(list):
    for number in list:
        sleep(0.2)  # hold the execution for 2 milli seconds
        print("sqare of {0} is {1}".format(number, number**2))


def cube(list):
    for number in list:
        # time.sleep(.2)
        sleep(0.2)  # hold the execution for 2 milli seconds
        print("Cube of {0} is {1}".format(number, number**3))


input_1 = [1, 2, 3, 4]
input_2 = (2,3,4, 5)
starting_time = time()  # takes the current system time
T1 = Thread(target=sqaure, args=(input_1,))
T2 = Thread(target=cube, args=(input_2,))

T1.start()  # Start the thread's activity. Must be called at most once per thread object
T2.start()
T1.join()  # to ensure that the main program waits for both threads to finish before continuing.
T2.join()  # to ensure that the main program waits for both threads to finish before continuing.
print(time()-starting_time)  # ending time - starting time  # 0.80 seconds

"""
# Output:
======
sqare of 1 is 1
Cube of 1 is 1
sqare of 2 is 4
Cube of 2 is 8
sqare of 3 is 9
Cube of 3 is 27
sqare of 4 is 16
Cube of 4 is 64
0.8262016773223877
"""
Author: Boyina Narendra
Supporting Author: M. Meera Sindhu
Request: If you find this information useful, please provide your valuable comments