Use webassets' built-in command line builder

atst/assets.py

@@ -1,11 +1,11 @@
 from webassets import Environment, Bundle
 from atst.home import home
 
-assets = Environment(
+environment = Environment(
     directory=home.child("scss"),
     url="/static"
 )
-print(assets.url_expire)
+
 css = Bundle(
     "atat.scss",
     filters="scss",
@@ -13,4 +13,4 @@ css = Bundle(
     depends=("**/*.scss"),
 )
 
-assets.register("css", css)
+environment.register("css", css)

atst/handler.py

@@ -1,8 +1,8 @@
 import tornado.web
-from atst.assets import assets
+from atst.assets import environment
 from atst.sessions import SessionNotFoundError
 
-helpers = {"assets": assets}
+helpers = {"assets": environment}
 
 
 class BaseHandler(tornado.web.RequestHandler):