linux-kernel - [PATCH net-next] selftests: openvswitch: Fix escape chars in regexp.

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Date: Tue, 16 Apr 2024 11:09:13 +0200
From: Adrian Moreno <amorenoz@...hat.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org (open list),
	Paolo Abeni <pabeni@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	dev@...nvswitch.org (open list:OPENVSWITCH),
	linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
	Pravin B Shelar <pshelar@....org>,
	aconole@...hat.com,
	"David S. Miller" <davem@...emloft.net>,
	Shuah Khan <shuah@...nel.org>,
	Jakub Kicinski <kuba@...nel.org>,
	Adrian Moreno <amorenoz@...hat.com>
Subject: [PATCH net-next] selftests: openvswitch: Fix escape chars in regexp.

Character sequences starting with `\` are interpreted by python as
escaped Unicode characters. However, they have other meaning in
regular expressions (e.g: "\d").

It seems Python >= 3.12 starts emitting a SyntaxWarning when these
escaped sequences are not recognized as valid Unicode characters.

An example of these warnings:

tools/testing/selftests/net/openvswitch/ovs-dpctl.py:505:
SyntaxWarning: invalid escape sequence '\d'

Fix all the warnings by flagging literals as raw strings.

Signed-off-by: Adrian Moreno <amorenoz@...hat.com>
---
 .../selftests/net/openvswitch/ovs-dpctl.py       | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
index 5e0e539a323d..1dd057afd3fb 100644
--- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
+++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py
@@ -489,7 +489,7 @@ class ovsactions(nla):
                     actstr, reason = parse_extract_field(
                         actstr,
                         "drop(",
-                        "([0-9]+)",
+                        r"([0-9]+)",
                         lambda x: int(x, 0),
                         False,
                         None,
@@ -502,9 +502,9 @@ class ovsactions(nla):
                     actstr = actstr[len("drop"): ]
                     return (totallen - len(actstr))
 
-            elif parse_starts_block(actstr, "^(\d+)", False, True):
+            elif parse_starts_block(actstr, r"^(\d+)", False, True):
                 actstr, output = parse_extract_field(
-                    actstr, None, "(\d+)", lambda x: int(x), False, "0"
+                    actstr, None, r"(\d+)", lambda x: int(x), False, "0"
                 )
                 self["attrs"].append(["OVS_ACTION_ATTR_OUTPUT", output])
                 parsed = True
@@ -512,7 +512,7 @@ class ovsactions(nla):
                 actstr, recircid = parse_extract_field(
                     actstr,
                     "recirc(",
-                    "([0-9a-fA-Fx]+)",
+                    r"([0-9a-fA-Fx]+)",
                     lambda x: int(x, 0),
                     False,
                     0,
@@ -588,17 +588,17 @@ class ovsactions(nla):
                                 actstr = actstr[3:]
 
                             actstr, ip_block_min = parse_extract_field(
-                                actstr, "=", "([0-9a-fA-F\.]+)", str, False
+                                actstr, "=", r"([0-9a-fA-F\.]+)", str, False
                             )
                             actstr, ip_block_max = parse_extract_field(
-                                actstr, "-", "([0-9a-fA-F\.]+)", str, False
+                                actstr, "-", r"([0-9a-fA-F\.]+)", str, False
                             )
 
                             actstr, proto_min = parse_extract_field(
-                                actstr, ":", "(\d+)", int, False
+                                actstr, ":", r"(\d+)", int, False
                             )
                             actstr, proto_max = parse_extract_field(
-                                actstr, "-", "(\d+)", int, False
+                                actstr, "-", r"(\d+)", int, False
                             )
 
                             if t is not None:
-- 
2.44.0