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Commitbbcbacc

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Python Threading Tutorial
1 parentb66bd47 commitbbcbacc

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‎Python/Threading/download-images.py

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importrequests
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importtime
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importconcurrent.futures
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img_urls= [
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'https://images.unsplash.com/photo-1516117172878-fd2c41f4a759',
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'https://images.unsplash.com/photo-1532009324734-20a7a5813719',
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'https://images.unsplash.com/photo-1524429656589-6633a470097c',
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'https://images.unsplash.com/photo-1530224264768-7ff8c1789d79',
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'https://images.unsplash.com/photo-1564135624576-c5c88640f235',
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'https://images.unsplash.com/photo-1541698444083-023c97d3f4b6',
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'https://images.unsplash.com/photo-1522364723953-452d3431c267',
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'https://images.unsplash.com/photo-1513938709626-033611b8cc03',
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'https://images.unsplash.com/photo-1507143550189-fed454f93097',
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'https://images.unsplash.com/photo-1493976040374-85c8e12f0c0e',
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'https://images.unsplash.com/photo-1504198453319-5ce911bafcde',
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'https://images.unsplash.com/photo-1530122037265-a5f1f91d3b99',
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'https://images.unsplash.com/photo-1516972810927-80185027ca84',
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'https://images.unsplash.com/photo-1550439062-609e1531270e',
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'https://images.unsplash.com/photo-1549692520-acc6669e2f0c'
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]
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t1=time.perf_counter()
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defdownload_image(img_url):
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img_bytes=requests.get(img_url).content
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img_name=img_url.split('/')[3]
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img_name=f'{img_name}.jpg'
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withopen(img_name,'wb')asimg_file:
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img_file.write(img_bytes)
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print(f'{img_name} was downloaded...')
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withconcurrent.futures.ThreadPoolExecutor()asexecutor:
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executor.map(download_image,img_urls)
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t2=time.perf_counter()
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print(f'Finished in{t2-t1} seconds')
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‎Python/Threading/threading-1.svg

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‎Python/Threading/threading-2.svg

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‎Python/Threading/threading-demo.py

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importconcurrent.futures
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importtime
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start=time.perf_counter()
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defdo_something(seconds):
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print(f'Sleeping{seconds} second(s)...')
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time.sleep(seconds)
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returnf'Done Sleeping...{seconds}'
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withconcurrent.futures.ThreadPoolExecutor()asexecutor:
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secs= [5,4,3,2,1]
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results=executor.map(do_something,secs)
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# for result in results:
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# print(result)
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# threads = []
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# for _ in range(10):
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# t = threading.Thread(target=do_something, args=[1.5])
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# t.start()
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# threads.append(t)
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# for thread in threads:
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# thread.join()
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finish=time.perf_counter()
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print(f'Finished in{round(finish-start,2)} second(s)')

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