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(1)
+ print(Actor.objects.all())

app/managers.py

@@ -0,0 +1,65 @@
+import sqlite3
+
+from app.models import Actor
+
+
+class ActorManager:
+ def __init__(self) -> None:
+ self._connection = sqlite3.connect("cinema_db.sqlite")
+ self.table_name = "actors"
+ with self.connection:
+ self.connection.execute(
+ f"CREATE TABLE IF NOT EXISTS {self.table_name}"
+ f"("
+ f"id INTEGER PRIMARY KEY,"
+ f"first_name VARCHAR(63) NOT NULL,"
+ f"last_name VARCHAR(63) NOT NULL"
+ f")"
+ )
+
+ def create(
+ self,
+ first_name: str,
+ last_name: str
+ ) -> None:
+ self._connection.execute(
+ f"INSERT INTO {self.table_name} "
+ "(first_name, last_name) "
+ "VALUES (?, ?);",
+ (first_name, last_name)
+ )
+ self._connection.commit()
+
+ def all(self) -> list:
+ actors_cursor = self._connection.execute(
+ "SELECT id, first_name, last_name "
+ f"FROM {self.table_name};"
+ )
+
+ return [Actor(*row) for row in actors_cursor]
+
+ def update(
+ self,
+ id_to_update: 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_update
+ )
+ )
+ self._connection.commit()
+
+ def delete(self, id_to_delete: int) -> 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