Add example

examples/providers/resource/resource.py

@@ -0,0 +1,32 @@
+"""`Resource` provider example."""
+
+import concurrent.futures
+
+from dependency_injector import containers, providers
+
+
+def init_threat_pool(max_workers: int):
+    thread_pool = concurrent.futures.ThreadPoolExecutor(max_workers=max_workers)
+    yield thread_pool
+    thread_pool.shutdown(wait=True)
+
+
+class Container(containers.DeclarativeContainer):
+
+    config = providers.Configuration()
+
+    thread_pool = providers.Resource(
+        init_threat_pool,
+        max_workers=config.max_workers,
+    )
+
+
+if __name__ == '__main__':
+    container = Container(config={'max_workers': 4})
+
+    container.init_resources()
+
+    thread_pool = container.thread_pool()
+    assert list(thread_pool.map(str, range(3))) == ['0', '1', '2']
+
+    container.shutdown_resources()