Introduce a special attributes model

Through this model, astroid starts knowing special attributes of certain Python objects,
such as functions, classes, super objects and so on. This was previously possible before,
but now the lookup and the attributes themselves are separated into a new module,
objectmodel.py, which describes, in a more comprehensive way, the data model of each
object.

1 files changed, 13 insertions, 0 deletions

diff --git a/astroid/util.py b/astroid/util.py
index 5c506b59..1111202f 100644
--- a/astroid/util.py
+++ b/astroid/util.py
@@ -8,10 +8,23 @@
 import sys
 import warnings
 
+import importlib
 import lazy_object_proxy
 import six
 
 
+def lazy_descriptor(obj):
+    class DescriptorProxy(lazy_object_proxy.Proxy):
+        def __get__(self, instance, owner=None):
+            return self.__class__.__get__(self, instance)
+    return DescriptorProxy(obj)
+
+
+def lazy_import(module_name):
+    return lazy_object_proxy.Proxy(
+        lambda: importlib.import_module('.' + module_name, 'astroid'))
+
+
 def reraise(exception):
     '''Reraises an exception with the traceback from the current exception
     block.'''