Fixed unresolved __qualname__ for instances and functions in Python 3.3 (PY-6745)

python/src/com/jetbrains/python/inspections/PyUnresolvedReferencesInspection.java

@@ -449,6 +449,11 @@ public class PyUnresolvedReferencesInspection extends PyInspection {
       if (description == null) {
         boolean marked_qualified = false;
         if (element instanceof PyQualifiedExpression) {
+          // TODO: Add __qualname__ for Python 3.3 to the skeleton of <class 'object'>, introduce a pseudo-class skeleton for
+          // <class 'function'>
+          if ("__qualname__".equals(ref_text) && LanguageLevel.forElement(element).isAtLeast(LanguageLevel.PYTHON33)) {
+            return;
+          }
           final PyQualifiedExpression qexpr = (PyQualifiedExpression)element;
           if (PyNames.COMPARISON_OPERATORS.contains(qexpr.getReferencedName()) || refname == null) {
             return;

python/testData/inspections/PyUnresolvedReferencesInspection/qualNameAttribute.py

@@ -0,0 +1,10 @@
+class C:
+    pass
+
+def f(x):
+    x.__qualname__ #pass
+
+C.__qualname__ #pass
+c = C()
+c.__qualname__ #pass
+f.__qualname__ #pass

python/testSrc/com/jetbrains/python/inspections/PyUnresolvedReferencesInspectionTest.java

@@ -1,6 +1,7 @@
 package com.jetbrains.python.inspections;
 
 import com.jetbrains.python.fixtures.PyTestCase;
+import com.jetbrains.python.psi.LanguageLevel;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -190,6 +191,16 @@ public class PyUnresolvedReferencesInspectionTest extends PyTestCase {
     doTest();
   }
 
+  // PY-6745
+  public void testQualNameAttribute() {
+    runWithLanguageLevel(LanguageLevel.PYTHON33, new Runnable() {
+      @Override
+      public void run() {
+        doTest();
+      }
+    });
+  }
+
   private void doTest() {
     myFixture.configureByFile(TEST_DIRECTORY + getTestName(true) + ".py");
     myFixture.enableInspections(PyUnresolvedReferencesInspection.class);