Add new method isKeywordOnly() in PyNamedParameter interface

python/psi-api/src/com/jetbrains/python/psi/PyNamedParameter.java

@@ -30,6 +30,14 @@ public interface PyNamedParameter extends PyParameter, PsiNamedElement, PsiNameI
 
   boolean isKeywordContainer();
 
+  /**
+   * Parameter is considered "keyword-only" if it appears after named or unnamed positional vararg parameter.
+   * See PEP-3102 for more details.
+   *
+   * @return whether this parameter is keyword-only
+   */
+  boolean isKeywordOnly();
+
   /**
    * @param includeDefaultValue if true, include the default value after an " = ".
    * @return Canonical representation of parameter. Includes asterisks for *param and **param, and name.

python/src/com/jetbrains/python/inspections/quickfix/AddCallSuperQuickFix.java

@@ -295,7 +295,7 @@ public class AddCallSuperQuickFix implements LocalQuickFix {
         else if (param.getText().startsWith("*")) {
           positionalContainer = param;
         }
-        else if (positionalContainer == null && singleStarParam == null) {
+        else if (param.getAsNamed() == null || !param.getAsNamed().isKeywordOnly()) {
           if (param.hasDefaultValue()) {
             myOptionalParams.add(param);
           }

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

@@ -124,6 +124,26 @@ public class PyNamedParameterImpl extends PyBaseElementImpl<PyNamedParameterStub
     }
   }
 
+  @Override
+  public boolean isKeywordOnly() {
+    final PyParameterList parameters = getStubOrPsiParentOfType(PyParameterList.class);
+    if (parameters == null) {
+      return false;
+    }
+    boolean varargSeen = false;
+    for (PyParameter param : parameters.getParameters()) {
+      if (param == this) {
+        break;
+      }
+      final PyNamedParameter named = param.getAsNamed();
+      if ((named != null && named.isPositionalContainer()) || param instanceof PySingleStarParameter) {
+        varargSeen = true;
+        break;
+      }
+    }
+    return varargSeen;
+  }
+
   @Nullable
   public PyExpression getDefaultValue() {
     final PyNamedParameterStub stub = getStub();