Add thread_pool_patterns

thread_pool_patterns/submit_use_sequentially.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+from time import sleep
+from random import randint
+from concurrent.futures import ThreadPoolExecutor
+
+
+def add_one(number):
+    print(number)
+    sleep(randint(0,2))
+    return number + 1
+
+
+def main():
+    with ThreadPoolExecutor(32) as executor:
+        futures = [executor.submit(add_one, number) for number in range(10)]
+        print(futures)
+        for future in futures:
+            print(future.result())
+
+
+if __name__ == "__main__":
+    main()