From patchwork Thu Oct 10 12:21:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 11183437 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3A7A314ED for ; Thu, 10 Oct 2019 12:45:49 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1B27720673 for ; Thu, 10 Oct 2019 12:45:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1B27720673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:37606 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIXpD-00071u-Oc for patchwork-qemu-devel@patchwork.kernel.org; Thu, 10 Oct 2019 08:45:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56650) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIXSF-00018Y-RG for qemu-devel@nongnu.org; Thu, 10 Oct 2019 08:22:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIXSE-0005pk-58 for qemu-devel@nongnu.org; Thu, 10 Oct 2019 08:22:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44192) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIXSD-0005pP-Vx for qemu-devel@nongnu.org; Thu, 10 Oct 2019 08:22:02 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E77A810DCCA2 for ; Thu, 10 Oct 2019 12:22:00 +0000 (UTC) Received: from localhost (ovpn-117-170.ams2.redhat.com [10.36.117.170]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5168A5DA2C; Thu, 10 Oct 2019 12:21:55 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH] trace: avoid "is" with a literal Python 3.8 warnings Date: Thu, 10 Oct 2019 13:21:54 +0100 Message-Id: <20191010122154.10553-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.64]); Thu, 10 Oct 2019 12:22:00 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Stefan Hajnoczi Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" The following statement produces a SyntaxWarning with Python 3.8: if len(format) is 0: scripts/tracetool/__init__.py:459: SyntaxWarning: "is" with a literal. Did you mean "=="? Use the conventional len(x) == 0 syntax instead. Reported-by: Daniel P. Berrangé Signed-off-by: Stefan Hajnoczi Reviewed-by: Daniel P. Berrangé Reviewed-by: Philippe Mathieu-Daudé --- scripts/tracetool/__init__.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/scripts/tracetool/__init__.py b/scripts/tracetool/__init__.py index 04279fa62e..44c118bc2a 100644 --- a/scripts/tracetool/__init__.py +++ b/scripts/tracetool/__init__.py @@ -456,12 +456,12 @@ def generate(events, group, format, backends, import tracetool format = str(format) - if len(format) is 0: + if len(format) == 0: raise TracetoolError("format not set") if not tracetool.format.exists(format): raise TracetoolError("unknown format: %s" % format) - if len(backends) is 0: + if len(backends) == 0: raise TracetoolError("no backends specified") for backend in backends: if not tracetool.backend.exists(backend):