From patchwork Tue Jun 9 20:52:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 280999 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4E8FC433E1 for ; Tue, 9 Jun 2020 20:58:45 +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 321C920734 for ; Tue, 9 Jun 2020 20:58:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ou/j2lQU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 321C920734 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54406 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jilKW-0002J5-7u for qemu-devel@archiver.kernel.org; Tue, 09 Jun 2020 16:58:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36354) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jilEv-0001gk-U2 for qemu-devel@nongnu.org; Tue, 09 Jun 2020 16:52:57 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:31222 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jilEu-0005be-Bm for qemu-devel@nongnu.org; Tue, 09 Jun 2020 16:52:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591735975; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=P+X2GehsEKSsVMlZEA77+G03NgvFhMOMVc9PxzTKk08=; b=Ou/j2lQUC8Rh3sE+7YoyrENTJLHKJsdfsARnXuopU1W7Kk67gHzV6eLFATjTrDfwiybU7i hxy5/s6glCRavsvpeKJsDopZyCaiDGgiWn97ftQRZO0BhMZHQefik4n/PbDNDBMKBTBUQ8 dASrtM5VYlbNZaV0v9DY5bxeorWQSlg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-268-UM8EKLwRMXe9u39n6v5vAw-1; Tue, 09 Jun 2020 16:52:53 -0400 X-MC-Unique: UM8EKLwRMXe9u39n6v5vAw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id ECEF51009613; Tue, 9 Jun 2020 20:52:51 +0000 (UTC) Received: from blue.redhat.com (ovpn-113-22.phx2.redhat.com [10.3.113.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F9EF6116D; Tue, 9 Jun 2020 20:52:51 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Subject: [PULL 07/15] qcow2_format.py: use modern string formatting Date: Tue, 9 Jun 2020 15:52:37 -0500 Message-Id: <20200609205245.3548257-8-eblake@redhat.com> In-Reply-To: <20200609205245.3548257-1-eblake@redhat.com> References: <20200609205245.3548257-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=eblake@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/09 02:44:16 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: Kevin Wolf , Andrey Shinkevich , Vladimir Sementsov-Ogievskiy , "open list:Block layer core" , Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy Use .format and f-strings instead of old %style. Also, the file uses both '' and "" quotes, for consistency let's use '', except for cases when we need '' inside the string (use "" to avoid extra escaping). Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Message-Id: <20200606081806.23897-7-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake --- tests/qemu-iotests/qcow2_format.py | 54 +++++++++++++++--------------- 1 file changed, 27 insertions(+), 27 deletions(-) diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py index e2f08ed69194..da66df340876 100644 --- a/tests/qemu-iotests/qcow2_format.py +++ b/tests/qemu-iotests/qcow2_format.py @@ -23,7 +23,7 @@ class QcowHeaderExtension: def __init__(self, magic, length, data): if length % 8 != 0: padding = 8 - (length % 8) - data += b"\0" * padding + data += b'\0' * padding self.magic = magic self.length = length @@ -41,26 +41,26 @@ class QcowHeader: fields = ( # Version 2 header fields - (uint32_t, '%#x', 'magic'), - (uint32_t, '%d', 'version'), - (uint64_t, '%#x', 'backing_file_offset'), - (uint32_t, '%#x', 'backing_file_size'), - (uint32_t, '%d', 'cluster_bits'), - (uint64_t, '%d', 'size'), - (uint32_t, '%d', 'crypt_method'), - (uint32_t, '%d', 'l1_size'), - (uint64_t, '%#x', 'l1_table_offset'), - (uint64_t, '%#x', 'refcount_table_offset'), - (uint32_t, '%d', 'refcount_table_clusters'), - (uint32_t, '%d', 'nb_snapshots'), - (uint64_t, '%#x', 'snapshot_offset'), + (uint32_t, '{:#x}', 'magic'), + (uint32_t, '{}', 'version'), + (uint64_t, '{:#x}', 'backing_file_offset'), + (uint32_t, '{:#x}', 'backing_file_size'), + (uint32_t, '{}', 'cluster_bits'), + (uint64_t, '{}', 'size'), + (uint32_t, '{}', 'crypt_method'), + (uint32_t, '{}', 'l1_size'), + (uint64_t, '{:#x}', 'l1_table_offset'), + (uint64_t, '{:#x}', 'refcount_table_offset'), + (uint32_t, '{}', 'refcount_table_clusters'), + (uint32_t, '{}', 'nb_snapshots'), + (uint64_t, '{:#x}', 'snapshot_offset'), # Version 3 header fields (uint64_t, 'mask', 'incompatible_features'), (uint64_t, 'mask', 'compatible_features'), (uint64_t, 'mask', 'autoclear_features'), - (uint32_t, '%d', 'refcount_order'), - (uint32_t, '%d', 'header_length'), + (uint32_t, '{}', 'refcount_order'), + (uint32_t, '{}', 'header_length'), ) fmt = '>' + ''.join(field[0] for field in fields) @@ -118,7 +118,7 @@ class QcowHeader: fd.seek(self.header_length) extensions = self.extensions - extensions.append(QcowHeaderExtension(0, 0, b"")) + extensions.append(QcowHeaderExtension(0, 0, b'')) for ex in extensions: buf = struct.pack('>II', ex.magic, ex.length) fd.write(buf) @@ -129,7 +129,7 @@ class QcowHeader: fd.write(self.backing_file) if fd.tell() > self.cluster_size: - raise Exception("I think I just broke the image...") + raise Exception('I think I just broke the image...') def update(self, fd): header_bytes = self.header_length @@ -152,21 +152,21 @@ class QcowHeader: bits.append(bit) value_str = str(bits) else: - value_str = f[1] % value + value_str = f[1].format(value) - print("%-25s" % f[2], value_str) + print(f'{f[2]:<25} {value_str}') def dump_extensions(self): for ex in self.extensions: data = ex.data[:ex.length] if all(c in string.printable.encode('ascii') for c in data): - data = "'%s'" % data.decode('ascii') + data = f"'{ data.decode('ascii') }'" else: - data = "" + data = '' - print("Header extension:") - print("%-25s %#x" % ("magic", ex.magic)) - print("%-25s %d" % ("length", ex.length)) - print("%-25s %s" % ("data", data)) - print("") + print('Header extension:') + print(f'{"magic":<25} {ex.magic:#x}') + print(f'{"length":<25} {ex.length}') + print(f'{"data":<25} {data}') + print()