Solution

app/main.py

@@ -1,13 +1,13 @@
-# from models import Actor
-# from managers import ActorManager
-#
-# if __name__ == "__main__":
-#  Actor.objects = ActorManager()
-#
-#  Actor.objects.create(first_name="Emma", last_name="Watson")
-#  Actor.objects.create(first_name="Daniel", last_name="Radclife")
-#  print(Actor.objects.all())
-#  Actor.objects.update(2, "Daniel", "Radcliffe")
-#  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.create(first_name_="Emma", last_name_="Watson")
+ Actor.objects.create(first_name_="Daniel", last_name_="Radclife")
+ print(Actor.objects.all())
+ Actor.objects.update(2, "Daniel", "Radcliffe")
+ print(Actor.objects.all())
+ Actor.objects.delete(4)
+ print(Actor.objects.all())

app/managers.py

@@ -0,0 +1,46 @@
+import sqlite3
+
+from app.models import Actor
+
+
+class ActorManager:
+ def __init__(self) -> None:
+ self._connection = sqlite3.connect("cinema.db3")
+ self.table_name = "actors"
+
+ def all(self) -> list:
+ actor_cursor = self._connection.execute(
+ f"SELECT * FROM {self.table_name}"
+ )
+
+ return [Actor(*row) for row in actor_cursor]
+
+ def create(self, first_name_: str, last_name_: str) -> None:
+ self._connection.execute(
+ f"INSERT INTO {self.table_name} (first_name, last_name)"
+ f"VALUES (?, ?)",
+ (first_name_, last_name_)
+ )
+ self._connection.commit()
+
+ def update(
+ self,
+ id_to_upd: int,
+ new_first_name: str,
+ new_last_name: str
+ ) -> None:
+ self._connection.execute(
+ f"UPDATE {self.table_name} "
+ "SET first_name = ?, last_name = ? "
+ "Where id = ?",
+ (new_first_name, new_last_name, id_to_upd)
+ )
+ self._connection.commit()
+
+ def delete(self, id_to_del: int) -> None:
+ self._connection.execute(
+ f"DELETE FROM {self.table_name} "
+ "WHERE id = ?",
+ (id_to_del,)
+ )
+ 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