Rzaeva

CPU-bound.py

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+from hashlib import md5
+from random import choice
+import concurrent.futures
+import time
+
+coins = [0, 0, 0, 0]
+
+
+def is_coin(n):
+    while True:
+        s = "".join([choice("0123456789") for i in range(50)])
+        h = md5(s.encode('utf8')).hexdigest()
+
+        if h.endswith("00000"):
+            n = str(s) + ' ' + str(h)
+            break
+    return n
+
+
+def main():
+    with concurrent.futures.ProcessPoolExecutor(max_workers=4) as executor:
+        for coin in zip(executor.map(is_coin, coins)):
+            print(coin)
+
+
+if __name__ == '__main__':
+    start_time = time.time()
+    main()
+    print("--- %s seconds ---" % (time.time() - start_time))
+
+

IO-bound.py

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+import concurrent.futures
+import urllib.request
+
+URLS = open('res.txt', encoding='utf8').read().splitlines()
+
+
+# Retrieve a single page and report the URL and contents
+def load_url(url, timeout):
+    with urllib.request.urlopen(url, timeout=timeout) as conn:
+        return conn.code
+
+
+# We can use a with statement to ensure threads are cleaned up promptly
+with concurrent.futures.ThreadPoolExecutor(max_workers=100) as executor:
+    # Start the load operations and mark each future with its URL
+    future_to_url = {executor.submit(load_url, url, 5): url for url in URLS}
+    for future in concurrent.futures.as_completed(future_to_url):
+        url = future_to_url[future]
+        try:
+            code = future.result()
+        except Exception as exc:
+            print('%r generated an exception: %s' % (url, exc))
+        else:
+            print(f'{code:d} code')

IO-bound_write_urls.py

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+from urllib.request import urlopen
+from urllib.parse import unquote
+from bs4 import BeautifulSoup
+from tqdm import tqdm
+
+url = 'https://ru.wikipedia.org/wiki/%D0%A1%D0%BB%D1%83%D0%B6%D0%B5%D0%B1%D0%BD%D0%B0%D1%8F:%D0%A1%D0%BB%D1%83%D1%87%D0%B0%D0%B9%D0%BD%D0%B0%D1%8F_%D1%81%D1%82%D1%80%D0%B0%D0%BD%D0%B8%D1%86%D0%B0'
+
+res = open('res.txt', 'w', encoding='utf8')
+
+for i in tqdm(range(100)):
+    html = urlopen(url).read().decode('utf8')
+    soup = BeautifulSoup(html, 'html.parser')
+    links = soup.find_all('a')
+
+    for l in links:
+        href = l.get('href')
+        if href and href.startswith('http') and 'wiki' not in href:
+            print(href, file=res)