[PATCH 2/2] dts: clear out Python syntax warnings

[Ariel Otilibili <otilibil@eurecom.fr>]

* follow up of a discussion with Robin Jarry
* since 3.12 invalid escape sequences generate SyntaxWarning
* in the future, these invalid sequences will generate SyntaxError
* therefore changed syntax to raw string notation.

Link: https://inbox.dpdk.org/dev/D6AMQXRSG8E7.33BAORRHRHV9A@redhat.com/
Link: https://docs.python.org/3/whatsnew/3.12.html#other-language-changes
Fixes: 99740300890 ("dts: use Python shell for Scapy instead of XML-RPC")
Fixes: 409359adce4 ("dts: fix smoke tests driver regex")

Cc: Paul Szczepanek <paul.szczepanek@arm.com>
Cc: Patrick Robb <probb@iol.unh.edu>
Cc: stable@dpdk.org
Suggested-by: Robin Jarry <rjarry@redhat.com>
Signed-off-by: Ariel Otilibili <otilibil@eurecom.fr>
---
 dts/framework/testbed_model/traffic_generator/scapy.py | 2 +-
 dts/tests/TestSuite_smoke_tests.py                     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dts/framework/testbed_model/traffic_generator/scapy.py b/dts/framework/testbed_model/traffic_generator/scapy.py
index 1251ca65a0..f42f663554 100644
--- a/dts/framework/testbed_model/traffic_generator/scapy.py
+++ b/dts/framework/testbed_model/traffic_generator/scapy.py
@@ -234,6 +234,6 @@ def _shell_start_and_stop_sniffing(self, duration: float) -> list[Packet]:
         )
         # In the string of bytes "b'XXXX'", we only want the contents ("XXXX")
         list_of_packets_base64 = re.findall(
-            f"^b'({REGEX_FOR_BASE64_ENCODING})'", packet_strs, re.MULTILINE
+            fr"^b'({REGEX_FOR_BASE64_ENCODING})'", packet_strs, re.MULTILINE
         )
         return [Ether(base64_bytes(pakt)) for pakt in list_of_packets_base64]
diff --git a/dts/tests/TestSuite_smoke_tests.py b/dts/tests/TestSuite_smoke_tests.py
index bc3a2a6bf9..a029a564eb 100644
--- a/dts/tests/TestSuite_smoke_tests.py
+++ b/dts/tests/TestSuite_smoke_tests.py
@@ -136,7 +136,7 @@ def test_device_bound_to_driver(self) -> None:
             # with the address for the nic we are on in the loop and then captures the
             # name of the driver in a group
             devbind_info_for_nic = re.search(
-                f"{nic.pci}[^\\n]*drv=([\\d\\w-]*) [^\\n]*",
+                fr"{nic.pci}[^\\n]*drv=([\\d\\w-]*) [^\\n]*",
                 all_nics_in_dpdk_devbind,
             )
             self.verify(
-- 
2.47.1