@Nullable
  public static PyExpression createExpressionFromFragment(@NotNull String expressionText, @NotNull PsiElement context) {
    final PyExpressionCodeFragmentImpl codeFragment =
      new PyExpressionCodeFragmentImpl(context.getProject(), "dummy.py", expressionText, false);
    codeFragment.setContext(context);
    final PyExpressionStatement statement = as(codeFragment.getFirstChild(), PyExpressionStatement.class);
    return statement != null ? statement.getExpression() : null;
  }
@Nullable
  public static PyExpression createExpressionFromFragment(@NotNull String expressionText, @NotNull PsiElement context)