minor PEP8 corrections

cookie_api/commands.py

@@ -3,6 +3,7 @@ from apistar.backends.sqlalchemy_backend import Session
 
 from models.schema import User
 
+
 def create_user(session: Session, email, password):
     user = User(email, password)
     session.add(user)

cookie_api/models/util.py

@@ -1,8 +1,9 @@
 import datetime as dt
 import decimal
 
+
 def alchemyencoder(obj):
-    """JSON encoder function for SQLAlchemy special classes."""
+    """JSON encoder function with support for ISO 8601 datetime serialization and Decimal to float casting"""
     if isinstance(obj, dt.datetime):
         return obj.isoformat()
     elif isinstance(obj, decimal.Decimal):