# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1475841088 -7200
# Node ID caa13d1fb177ac1b61c5ae39995180732b88cc28
# Parent  6cc807f909843c5e7f18cb821439081542ce5411
Created a separate method for identifying unbound method providers.

diff -r 6cc807f90984 -r caa13d1fb177 deducer.py
--- a/deducer.py	Thu Oct 06 19:29:53 2016 +0200
+++ b/deducer.py	Fri Oct 07 13:51:28 2016 +0200
@@ -959,21 +959,32 @@
                 # For each class type suggested by the usage, examine the
                 # attribute provided for the attribute name.
 
-                for class_type in self.get_class_types_for_usage(usage):
-                    ref = self.importer.get_class_attribute(class_type, attrname)
-
-                    # Test the attribute for being an unbound method provided by
-                    # the class or an ancestor.
-
-                    parent_class = ref and ref.parent()
-
-                    if ref and ref.has_kind("<function>") and (
-                        class_type == parent_class or class_type in self.descendants[parent_class]):
-
-                        # Record all class types providing the unbound method.
-
-                        init_item(self.invoked_attr_types, location, set)
-                        self.invoked_attr_types[location].add(class_type)
+                providers = self.get_unbound_method_providers(self.get_class_types_for_usage(usage), attrname)
+
+                # Record all class types providing the unbound method.
+
+                init_item(self.invoked_attr_types, location, set)
+                self.invoked_attr_types[location].update(providers)
+
+    def get_unbound_method_providers(self, class_types, attrname):
+
+        providers = set()
+
+        for class_type in class_types:
+            ref = self.importer.get_class_attribute(class_type, attrname)
+
+            # Test the attribute for being an unbound method provided by
+            # the class or an ancestor.
+
+            parent_class = ref and ref.parent()
+
+            if ref and ref.has_kind("<function>") and (
+                class_type == parent_class or
+                class_type in self.descendants[parent_class]):
+
+                providers.add(class_type)
+
+        return providers
 
     # Simplification of types.