added restful_test, added thread test

python_algorithms/Threads/threads.py

@@ -0,0 +1,49 @@
+#! /usr/bin/python3
+
+# This example shows how to launch threads from a Python script
+
+import threading 
+import time
+
+start = time.perf_counter() #start the stopwatch
+
+#Let's define the Function to execute in the thread:
+def do_something():
+    print('Sleeping 1 second...')
+    time.sleep(1)
+    print('Done sleeping.')
+
+
+#Declare the thread, link it to the function above:
+t1 = threading.Thread(target=do_something)
+t2 = threading.Thread(target=do_something)
+
+#Start the thread:
+t1.start()   #start the first thread, then continues the script
+t2.start()   #start the second thread, then continues the script
+
+#join:
+t1.join()
+t2.join()
+
+finish = time.perf_counter()
+print (f'Finished in {round(finish-start,2)} second(s)')
+
+
+print ('===============================================')
+#Alternatively we can use the concurrent.futures module
+
+import concurrent.futures
+
+def do_something_for(seconds):
+    print(f'Sleeping {seconds} second(s)...')
+    time.sleep(seconds)
+    return f'Done Sleeping {seconds} second(s).'
+
+
+with concurrent.futures.ThreadPoolExecutor() as executor:
+    secs = [5, 4, 3, 2, 1]
+    results = [executor.submit(do_something_for, sec) for sec in secs]
+    
+    for f in concurrent.futures.as_completed(results):
+        print(f.result())