Remove unnecessary configurability from back.py

back.py

@@ -5,16 +5,15 @@
 
 import functools
 from flask import session, request, redirect as flask_redirect, url_for
-import config
 
-cookie = getattr(config, "REDIRECT_BACK_COOKIE", "back")
-default_view = getattr(config, "REDIRECT_BACK_DEFAULT", "index")
+COOKIE_NAME = "back"
+DEFAULT_VIEW = "index"
 
 
-def anchor(func, cookie=cookie):
+def anchor(func, COOKIE_NAME=COOKIE_NAME):
     @functools.wraps(func)
     def result(*args, **kwargs):
-        session[cookie] = request.url
+        session[COOKIE_NAME] = request.url
         return func(*args, **kwargs)
     return result
 
@@ -23,12 +22,12 @@ def default_url(default, **url_args):
     return url_for(default, **url_args)
 
 
-def url(default=default_view, cookie=cookie, **url_args):
-    return session.get(cookie, default_url(default, **url_args))
+def url(default=DEFAULT_VIEW, COOKIE_NAME=COOKIE_NAME, **url_args):
+    return session.get(COOKIE_NAME, default_url(default, **url_args))
 
 
-def redirect(default=default_view, cookie=cookie, **url_args):
-    target = url(default, cookie, **url_args)
+def redirect(default=DEFAULT_VIEW, COOKIE_NAME=COOKIE_NAME, **url_args):
+    target = url(default, COOKIE_NAME, **url_args)
     if target == request.url:
         target = default_url(default, **url_args)
     return flask_redirect(target)