[PATCH 1/2] buildtools,devtools: 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: 9d4efc5cc6f ("buildtools: fix NUMA nodes count")
Fixes: f88b0b89220 ("devtools: forbid indent with tabs in Meson")

Cc: Bruce Richardson <bruce.richardson@intel.com>
Cc: stable@dpdk.org
Suggested-by: Robin Jarry <rjarry@redhat.com>
Signed-off-by: Ariel Otilibili <otilibil@eurecom.fr>
---
 buildtools/get-numa-count.py | 2 +-
 devtools/check-meson.py      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/buildtools/get-numa-count.py b/buildtools/get-numa-count.py
index 2f243886cd..f8bea5b58e 100644
--- a/buildtools/get-numa-count.py
+++ b/buildtools/get-numa-count.py
@@ -11,7 +11,7 @@
 if os.name == 'posix':
     if os.path.isdir('/sys/devices/system/node'):
         numa_nodes = glob.glob('/sys/devices/system/node/node*')
-        numa_nodes.sort(key=lambda l: int(re.findall('\d+', l)[0]))
+        numa_nodes.sort(key=lambda l: int(re.findall(r'\d+', l)[0]))
         print(int(os.path.basename(numa_nodes[-1])[4:]) + 1)
     else:
         subprocess.run(['sysctl', '-n', 'vm.ndomains'], check=False)
diff --git a/devtools/check-meson.py b/devtools/check-meson.py
index 4b2338828d..9a33d8b036 100755
--- a/devtools/check-meson.py
+++ b/devtools/check-meson.py
@@ -51,7 +51,7 @@ def check_indentation(filename, contents):
         code, comments = split_code_comments(line)
         if not code.strip():
             continue
-        if re.match('^ *\t', code):
+        if re.match(r'^ *\t', code):
             print(f'Error parsing {filename}:{lineno}, got some tabulation')
         if code.endswith('files('):
             if infiles:
-- 
2.47.1