Solution

app/main.py

@@ -11,3 +11,10 @@
 #     print(Actor.objects.all())
 #     Actor.objects.delete(1)
 #     print(Actor.objects.all())
+from models import Actor
+from managers import ActorManager
+
+if __name__ == "__main__":
+    Actor.objects = ActorManager()
+    Actor.objects.delete(1)
+    print(Actor.objects.all())

app/managers.py

@@ -0,0 +1,50 @@
+import sqlite3
+
+from models import Actor
+
+
+class ActorManager:
+    def __init__(self) -> None:
+        self._connection = sqlite3.connect("../cinema.sqlite")
+        self.table_name = "actors"
+
+    def all(self) -> list:
+        actors_cursor = self._connection.execute(
+            f"SELECT * FROM {self.table_name}"
+        )
+        return [
+            Actor(*row) for row in actors_cursor
+        ]
+
+    def create(
+            self,
+            first_name: str,
+            last_name: str
+    ) -> None:
+        self._connection.execute(
+            f"INSERT INTO {self.table_name} "
+            f"(first_name, last_name) VALUES (?,?) ",
+            (first_name, last_name,)
+        )
+        self._connection.commit()
+
+    def update(
+            self,
+            id_to_update: int,
+            new_first_name: str,
+            new_last_name: str
+    ) -> None:
+        self._connection.execute(
+            f"UPDATE {self.table_name} "
+            f"SET first_name = ?, last_name = ? "
+            f"WHERE id = ? ",
+            (new_first_name, new_last_name, id_to_update)
+        )
+        self._connection.commit()
+
+    def delete(self, id_to_delete: str) -> None:
+        self._connection.execute(
+            f"DELETE FROM {self.table_name} WHERE id = ? ",
+            (id_to_delete,)
+        )
+        self._connection.commit()

app/models.py

@@ -0,0 +1,8 @@
+from dataclasses import dataclass
+
+
+@dataclass()
+class Actor:
+    id: int
+    first_name: str
+    last_name: str