CDE

Task/Concurrent-computing/Python/concurrent-computing-1.py

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+Python 3.2 (r32:88445, Feb 20 2011, 21:30:00) [MSC v.1500 64 bit (AMD64)] on win 32
+Type "help", "copyright", "credits" or "license" for more information.
+>>> from concurrent import futures
+>>> with futures.ProcessPoolExecutor() as executor:
+...   _ = list(executor.map(print, 'Enjoy Rosetta Code'.split()))
+...
+Enjoy
+Rosetta
+Code
+>>>

Task/Concurrent-computing/Python/concurrent-computing-2.py

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+import threading
+import random
+
+def echo(text):
+    print(text)
+
+threading.Timer(random.random(), echo, ("Enjoy",)).start()
+threading.Timer(random.random(), echo, ("Rosetta",)).start()
+threading.Timer(random.random(), echo, ("Code",)).start()

Task/Concurrent-computing/Python/concurrent-computing-3.py

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+import threading
+import random
+
+def echo(text):
+    print(text)
+
+for text in ["Enjoy", "Rosetta", "Code"]:
+    threading.Timer(random.random(), echo, (text,)).start()

Task/Concurrent-computing/Python/concurrent-computing-4.py

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+import random, sys, time
+import threading
+
+lock = threading.Lock()
+
+def echo(s):
+    time.sleep(1e-2*random.random())
+    # use `.write()` with lock due to `print` prints empty lines occasionally
+    with lock:
+        sys.stdout.write(s)
+        sys.stdout.write('\n')
+
+for line in 'Enjoy Rosetta Code'.split():
+    threading.Thread(target=echo, args=(line,)).start()

Task/Concurrent-computing/Python/concurrent-computing-5.py

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+from __future__ import print_function
+from multiprocessing import Pool
+
+def main():
+    p = Pool()
+    p.map(print, 'Enjoy Rosetta Code'.split())
+
+if __name__=="__main__":
+    main()

Task/Concurrent-computing/Python/concurrent-computing-6.py

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+import random
+from twisted.internet    import reactor, task, defer
+from twisted.python.util import println
+
+delay = lambda: 1e-4*random.random()
+d = defer.DeferredList([task.deferLater(reactor, delay(), println, line)
+                        for line in 'Enjoy Rosetta Code'.split()])
+d.addBoth(lambda _: reactor.stop())
+reactor.run()

Task/Concurrent-computing/Python/concurrent-computing-7.py

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+from __future__ import print_function
+import random
+import gevent
+
+delay = lambda: 1e-4*random.random()
+gevent.joinall([gevent.spawn_later(delay(), print, line)
+               for line in 'Enjoy Rosetta Code'.split()])