Add thread_pool_patterns

thread_pool_patterns/submit_wait_for_all.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+from time import sleep
+from random import randint
+from concurrent.futures import ThreadPoolExecutor, wait, Future
+
+results: list[int] = []
+
+def add_one(number: int) -> int:
+    print(number)
+    sleep(randint(0,2))
+    return number + 1
+
+
+def main() -> None:
+    executor = ThreadPoolExecutor(32)
+    futures: list[Future] = [executor.submit(add_one, number) for number in range(10)]
+    wait(futures)
+    print("Done waiting!")
+    for future in futures:
+        print(future.result())
+    print("All done!")
+
+    futures: list[Future] = [executor.submit(add_one, number) for number in range(10)]
+    executor.shutdown()
+    print("Done waiting!")
+    for future in futures:
+        print(future.result())
+    print("All done!")
+
+    with ThreadPoolExecutor() as executor:
+        futures: list[Future] = [executor.submit(add_one, number) for number in range(10)]
+    print("Done waiting!")
+    for future in futures:
+        print(future.result())
+    print("All done!")
+
+
+if __name__ == "__main__":
+    main()