multithreading.py

#import threading
import time
import concurrent.futures

start = time.perf_counter()

def do_something(seconds):
    print(f'Sleeping {seconds} second(s)..')
    time.sleep(seconds)
    return f'Done sleeping...{seconds}'



#t1 = threading.Thread(target=do_something)
#t2 = threading.Thread(target=do_something)
#
#t1.start()
#t2.start()
#
#t1.join()
#t2.join()

#threads = []
#
#for _ in range(1000):
#    t = threading.Thread(target=do_something, args=[1.5])
#    t.start() 
#    threads.append(t)
#
#for thread in threads:
#    thread.join()
#


with concurrent.futures.ThreadPoolExecutor() as executor:
    secs = [5,4,3,2,1, 10]
    #results = [executor.submit(do_something, sec) for sec in secs]
    results = executor.map(do_something, secs)

    for result in results:
        print(result)

    #for f in concurrent.futures.as_completed(results):
    #    print(f.result())
   
   
    #f1 = executor.submit(do_something, 1)
    #f2 = executor.submit(do_something, 2)
    
finish = time.perf_counter()

print(f'Finished in {round(finish-start, 2)} second(s)')



import requests
import time
import concurrent.futures

img_urls = [
    'https://images.unsplash.com/photo-1516117172878-fd2c41f4a759',
    'https://images.unsplash.com/photo-1532009324734-20a7a5813719',
    'https://images.unsplash.com/photo-1524429656589-6633a470097c',
    'https://images.unsplash.com/photo-1530224264768-7ff8c1789d79',
    'https://images.unsplash.com/photo-1564135624576-c5c88640f235',
    'https://images.unsplash.com/photo-1541698444083-023c97d3f4b6',
    'https://images.unsplash.com/photo-1522364723953-452d3431c267',
    'https://images.unsplash.com/photo-1513938709626-033611b8cc03',
    'https://images.unsplash.com/photo-1507143550189-fed454f93097',
    'https://images.unsplash.com/photo-1493976040374-85c8e12f0c0e',
    'https://images.unsplash.com/photo-1504198453319-5ce911bafcde',
    'https://images.unsplash.com/photo-1530122037265-a5f1f91d3b99',
    'https://images.unsplash.com/photo-1516972810927-80185027ca84',
    'https://images.unsplash.com/photo-1550439062-609e1531270e',
    'https://images.unsplash.com/photo-1549692520-acc6669e2f0c'
]

t1 = time.perf_counter()


def download_image(img_url):
    img_bytes = requests.get(img_url).content
    img_name = img_url.split('/')[3]
    img_name = f'{img_name}.jpg'
    with open(img_name, 'wb') as img_file:
        img_file.write(img_bytes)
        print(f'{img_name} was downloaded...')


with concurrent.futures.ThreadPoolExecutor() as executor:
    executor.map(download_image, img_urls)


t2 = time.perf_counter()

print(f'Finished in {t2-t1} seconds')