Example of unclear ImportError

1 files changed, 26 insertions, 0 deletions

diff --git a/astroid/util.py b/astroid/util.py
index 96ba5fbf..8e96f935 100644
--- a/astroid/util.py
+++ b/astroid/util.py
@@ -23,6 +23,8 @@ import sys
 
 import six
 
+from astroid import exceptions
+
 
 def reraise(exception):
     '''Reraises an exception with the traceback from the current exception
@@ -45,3 +47,27 @@ class YES(object):
 
     def __call__(self, *args, **kwargs):
         return self
+
+
+def get_external_assignments(root, subject, attributes):
+    stack = [root]
+    while stack:
+        node = stack.pop()
+        stack.extend(node.get_children())
+        if isinstance(node, node_classes.AssignAttr):
+            frame = node.frame()
+            try:
+                for inferred in (n for n in node.expr.infer() if n is subject):
+                    values = attributes[node.attrname]
+                    if node in values:
+                        continue
+                    else:
+                        if (values and frame.is_function and
+                            frame.name == '__init__' and not
+                            values[0].frame().name == '__init__'):
+                            values.insert(0, node)
+                        else:
+                            values.append(node)
+            except exceptions.InferenceError:
+                pass
+    return attributes