Prevents incorrect resolution of unqalified names to qualified. Closes PY-153.

python/src/com/jetbrains/python/psi/NameDefiner.java

@@ -127,9 +127,13 @@ public interface NameDefiner extends PsiElement {
     public static PyElement findName(Iterable<PyElement> it, String name) {
       PyElement ret = null;
       for (PyElement elt : it) {
-        if ((elt != null) && (name.equals(elt.getName()))) {
-          ret = elt;
-          break;
+        if (elt != null) {
+          // qualified refs don't match by last name, and we're not checking FQNs here
+          if (elt instanceof PyQualifiedExpression && ((PyQualifiedExpression)elt).getQualifier() != null) continue;
+          if (name.equals(elt.getName())) { // plain name matches
+            ret = elt;
+            break;
+          }
         }
       }
       return ret;

python/src/com/jetbrains/python/psi/impl/PyReferenceExpressionImpl.java

@@ -320,6 +320,8 @@ public class PyReferenceExpressionImpl extends PyElementImpl implements PyRefere
     return ret.toArray(new ResolveResult[ret.size()]);
   }
 
+  private static boolean USE_CACHE = true; // change to false in debug time to switch off caching
+
   /**
    * Resolves reference to possible referred elements.
    * First element is always what resolve() would return.
@@ -332,7 +334,7 @@ public class PyReferenceExpressionImpl extends PyElementImpl implements PyRefere
   @NotNull
   public ResolveResult[] multiResolve(final boolean incompleteCode) {
     final PsiManager manager = getElement().getManager();
-    if (manager instanceof PsiManagerImpl) {
+    if (USE_CACHE && manager instanceof PsiManagerImpl) {
       final ResolveCache cache = ((PsiManagerImpl)manager).getResolveCache();
       return cache.resolveWithCaching(this, CachingResolver.INSTANCE, false, incompleteCode);
     }

python/testData/resolve/QualifiedFalseTarget.py

@@ -0,0 +1,7 @@
+class Bobobo:
+  zoo = 1
+
+b = Bobobo()
+b.zoo = 2
+
+<ref>zoo # must not resolve

python/testSrc/com/jetbrains/python/PyResolveTest.java

@@ -88,6 +88,11 @@ public class PyResolveTest extends ResolveTestCase {
     assertTrue(targetElement instanceof PyTargetExpression);
   }
 
+  public void testQualifiedFalseTarget() throws Exception {
+    PsiElement targetElement = resolve();
+    assertNull(targetElement);
+  }
+
   public void testInnerFuncVar() throws Exception {
     PsiElement targetElement = resolve();
     assertTrue(targetElement instanceof PyTargetExpression);