diff --git a/core/cdag/tx.py b/core/cdag/tx.py
index 899bc9149091c3910b985dec52142c2d1cb9c82f..821531ad16a3d036ef38dcceb59aac3321e3b9e8 100644
--- a/core/cdag/tx.py
+++ b/core/cdag/tx.py
@@ -6,7 +6,7 @@
 # ----------------------------------------------------------------------
 
 # Python modules
-from typing import Any, Dict, Optional
+from typing import Any, Dict
 
 # NOC modules
 from .typing import ValueType
diff --git a/core/profile/base.py b/core/profile/base.py
index 572094630f9a971aeb14bb37245be9a1dc0924c6..346a6cbdc549ad2a1d62d341d58de3b88a82f43e 100644
--- a/core/profile/base.py
+++ b/core/profile/base.py
@@ -182,8 +182,8 @@ class BaseProfile(object, metaclass=BaseProfileMetaclass):
     NB: Sending logic is implemented in *commands* script
 
     Examples:
-    "^.+\\" -- treat trailing backspace as continuation
-    "banner\s+login\s+(\S+)" -- continue until matched group
+    r"^.+\\" -- treat trailing backspace as continuation
+    r"banner\s+login\s+(\S+)" -- continue until matched group   # noqa: W605
     """
 
     pattern_mml_end = None
diff --git a/scripts/deploy/change-ip.py b/scripts/deploy/change-ip.py
index 5ee57c73f54c2671ecaa13c15c64dfeac0fe8617..0eb73787e46886fb44b679822db67ada1fd1bcbc 100755
--- a/scripts/deploy/change-ip.py
+++ b/scripts/deploy/change-ip.py
@@ -50,21 +50,31 @@ ALL_PATHS = [
     TELEGRAF_PG,
     TELEGRAF_MG,
     TELEGRAF_NG,
-    PGBOUNCER
+    PGBOUNCER,
 ]
 
+
 def take_postgresql_version():
     distr_family = guess_system_type()
     ver = ""
     if distr_family == "deb":
-        sp = subprocess.run(['dpkg-query -W -f=\'${package} ${status}\n\' postgresql-*|grep "install ok installed" | '
-                             'grep -Po "(\\d.?\\d+)"|sort -u'], stdout=subprocess.PIPE, shell=True)
-        ver = str(sp.stdout.decode('utf-8')).rstrip('\n')
+        sp = subprocess.run(
+            [
+                "dpkg-query -W -f='${package} ${status}\n' postgresql-*|grep \"install ok installed\" | "
+                'grep -Po "(\\d.?\\d+)"|sort -u'
+            ],
+            stdout=subprocess.PIPE,
+            shell=True,
+        )
+        ver = str(sp.stdout.decode("utf-8")).rstrip("\n")
         return ver
     if distr_family == "rpm":
-        sp = subprocess.run(['yum list installed postgresql* | '
-                             'grep -Po \'postgresql\\K\\d*(?=-server)\''], stdout=subprocess.PIPE, shell=True)
-        ver = str(sp.stdout.decode('utf-8')).rstrip('\n')
+        sp = subprocess.run(
+            ["yum list installed postgresql* | " "grep -Po 'postgresql\\K\\d*(?=-server)'"],
+            stdout=subprocess.PIPE,
+            shell=True,
+        )
+        ver = str(sp.stdout.decode("utf-8")).rstrip("\n")
         if ver == "96":
             ver = "9.6"
             return ver
@@ -74,8 +84,10 @@ def take_postgresql_version():
 
 def guess_system_type():
     """Trys to figure out what system do we have, deb or rpm like"""
-    stream = os.popen('grep "^NAME=" /etc/os-release |cut -d "=" -f 2 | sed -e \'s/^"//\' -e \'s/"$//\'')
-    output = stream.read().rstrip('\n')
+    stream = os.popen(
+        'grep "^NAME=" /etc/os-release |cut -d "=" -f 2 | sed -e \'s/^"//\' -e \'s/"$//\''
+    )
+    output = stream.read().rstrip("\n")
 
     if "Ubuntu" in output or "Debian GNU/Linux" in output:
         distr_fam = "deb"
diff --git a/services/classifier/xrulelookup.py b/services/classifier/xrulelookup.py
index 6b871d3d30171977ebf201661ca254b31e939614..42d27abe7d32a5b6afcbefa6ff9fa53a8cccc13a 100644
--- a/services/classifier/xrulelookup.py
+++ b/services/classifier/xrulelookup.py
@@ -17,7 +17,9 @@ import sre_parse
 try:
     import esmre as esm
 except (ModuleNotFoundError, ImportError):
-    raise NotImplementedError("XRuleLookup needed ESMRE library for worked. Please, install it from pip")
+    raise NotImplementedError(
+        "XRuleLookup needed ESMRE library for worked. Please, install it from pip"
+    )
 import bitarray
 
 # NOC modules