Merge pull request #10 from vertti/fix-persistent-session

Fix Session lint issues

.gitignore

@@ -80,3 +80,4 @@ preprocessor.py
 .env
 .venv
 .idea
+.vscode

persistence.py

@@ -2,7 +2,9 @@ from datetime import datetime
 
 from sqlalchemy import Boolean, Column, DateTime, Float, Integer, String, create_engine
 from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import scoped_session, sessionmaker
+from sqlalchemy.orm.scoping import scoped_session
+from sqlalchemy.orm.session import sessionmaker
+
 from sqlalchemy.types import Enum
 
 from exchange import Exchange, get_exchange_api
@@ -15,14 +17,13 @@ else:
     db_handle = 'sqlite:///tradesv2.sqlite'
 
 engine = create_engine(db_handle, echo=False)
-Session = scoped_session(sessionmaker(bind=engine, autoflush=True, autocommit=True))
+session = scoped_session(sessionmaker(bind=engine, autoflush=True, autocommit=True))
+Session = session()
 Base = declarative_base()
 
-
 class Trade(Base):
     __tablename__ = 'trades'
-
-    query = Session.query_property()
+    query = session.query_property()
 
     id = Column(Integer, primary_key=True)
     exchange = Column(Enum(Exchange), nullable=False)

rpc/telegram.py

@@ -244,7 +244,6 @@ class TelegramHandler(object):
         if not get_instance().is_alive():
             TelegramHandler.send_msg('`trader is not running`', bot=bot)
             return
-
         pair_rates = Session.query(Trade.pair, func.sum(Trade.close_profit).label('profit_sum')) \
             .filter(Trade.is_open.is_(False)) \
             .group_by(Trade.pair) \