first one

bot/app/db/engine.py

@@ -0,0 +1,17 @@
+from sqlalchemy import create_engine, MetaData
+from db.settings import Settings
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy.ext.declarative import declarative_base
+
+
+class Database:
+    def __init__(self):
+        self.engine = create_engine("postgresql+psycopg2://user:password@postgres:5432/db")
+        self.meta = MetaData()
+        self.engine.connect()
+        self.meta.create_all(bind=self.engine)
+        self._Session = sessionmaker(bind=self.engine)
+        self.base = declarative_base()
+
+    def session(self):
+        return self._Session