migrate apps/amo/utils.py

apps/amo/__init__.py

@@ -4,7 +4,6 @@
 import threading
 
 import commonware.log
-from caching.base import CachingQuerySet
 
 from mkt.constants.applications import *
 from mkt.constants.base import *
@@ -31,65 +30,6 @@ def set_user(user):
     _locals.user = user
 
 
-def cached_property(*args, **kw):
-    # Handles invocation as a direct decorator or
-    # with intermediate keyword arguments.
-    if args:  # @cached_property
-        return CachedProperty(args[0])
-    else:     # @cached_property(name=..., writable=...)
-        return lambda f: CachedProperty(f, **kw)
-
-
-class CachedProperty(object):
-    """
-    A decorator that converts a function into a lazy property.  The
-    function wrapped is called the first time to retrieve the result
-    and than that calculated result is used the next time you access
-    the value::
-
-        class Foo(object):
-
-            @cached_property
-            def foo(self):
-                # calculate something important here
-                return 42
-
-    Lifted from werkzeug.
-    """
-
-    def __init__(self, func, name=None, doc=None, writable=False):
-        self.func = func
-        self.writable = writable
-        self.__name__ = name or func.__name__
-        self.__doc__ = doc or func.__doc__
-
-    def __get__(self, obj, type=None):
-        if obj is None:
-            return self
-        _missing = object()
-        value = obj.__dict__.get(self.__name__, _missing)
-        if value is _missing:
-            value = self.func(obj)
-            if isinstance(value, CachingQuerySet):
-                # Work around a bug in django-cache-machine that
-                # causes deadlock or infinite recursion if
-                # CachingQuerySets are cached before they run their
-                # query.
-                value._fetch_all()
-            obj.__dict__[self.__name__] = value
-        return value
-
-    def __set__(self, obj, value):
-        if not self.writable:
-            raise TypeError('read only attribute')
-        obj.__dict__[self.__name__] = value
-
-    def __delete__(self, obj):
-        if not self.writable:
-            raise TypeError('read only attribute')
-        del obj.__dict__[self.__name__]
-
-
 # We need to import waffle here to avoid a circular import with jingo which
 # loads all INSTALLED_APPS looking for helpers.py files, but some of those apps
 # import jingo.