init2

test.py

@@ -1,4 +1,19 @@
-from prefect import flow
+from prefect import flow, task
+from prefect.assets import materialize
+
+@materialize("s3://assets_a")
+def assets_a():
+    print("assets_a")
+
+
+@materialize("s3://assets_b", asset_deps=["s3://assets_a"])
+def assets_b():
+    print("assets_b")
+
+@task(name="task_a")
+def task_a():
+    assets_b()
+    print("task_a")
 
 @flow(log_prints=True)
 def explain_flows():