From 03d4ab37657123e4ba3258ccf1867e645630b111 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Fri, 2 Mar 2018 13:25:40 +0200
Subject: [PATCH] Fix create_engine check

---
 telethon/sessions/sqlalchemy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/telethon/sessions/sqlalchemy.py b/telethon/sessions/sqlalchemy.py
index 94f24a1e..782f811f 100644
--- a/telethon/sessions/sqlalchemy.py
+++ b/telethon/sessions/sqlalchemy.py
@@ -49,7 +49,7 @@ class DBSentFile(Base):
 
 class AlchemySessionContainer:
     def __init__(self, database):
-        if not isinstance(database, sql.Engine):
+        if isinstance(database, str):
             database = sql.create_engine(database)
 
         self.db_engine = database