@Override
 public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
   PsiElement expression = descriptor.getPsiElement();
   if (expression instanceof PyTupleExpression) {
     PyElementGenerator elementGenerator = PyElementGenerator.getInstance(project);
     PyExpressionStatement statement =
         elementGenerator.createFromText(
             LanguageLevel.forElement(expression),
             PyExpressionStatement.class,
             "(" + expression.getText() + ")");
     expression.replace(statement.getExpression());
   }
 }
  @Override
  public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
    final PsiElement element = descriptor.getPsiElement();
    final PyFunction function = PsiTreeUtil.getParentOfType(element, PyFunction.class, false);
    assert function != null;
    final PyParameterList parameterList = function.getParameterList();
    final PyParameter[] parameters = parameterList.getParameters();
    final PyElementGenerator generator = PyElementGenerator.getInstance(project);
    String selfText = parameters.length != 0 ? parameters[0].getText() : PyNames.CANONICAL_SELF;
    final StringBuilder functionText = new StringBuilder("def foo(" + selfText);
    if (myHasValue) {
      String valueText = parameters.length > 1 ? parameters[1].getText() : "value";
      functionText.append(", ").append(valueText);
    }
    functionText.append("): pass");

    final PyParameterList list =
        generator
            .createFromText(
                LanguageLevel.forElement(element), PyFunction.class, functionText.toString())
            .getParameterList();
    parameterList.replace(list);
  }