diff --git a/tools/utils/git_log_review_commits.py b/tools/utils/git_log_review_commits.py
index f5c9c637514..a57b4548fe0 100755
--- a/tools/utils/git_log_review_commits.py
+++ b/tools/utils/git_log_review_commits.py
@@ -37,10 +37,8 @@ class _GetchUnix:
 
     def __init__(self):
         import tty
-        import sys
 
     def __call__(self):
-        import sys
         import tty
         import termios
         fd = sys.stdin.fileno()
diff --git a/tools/utils_ide/project_info.py b/tools/utils_ide/project_info.py
index aa66ffd64b3..1b024e4803a 100755
--- a/tools/utils_ide/project_info.py
+++ b/tools/utils_ide/project_info.py
@@ -210,14 +210,14 @@ def cmake_advanced_info() -> (
 def cmake_cache_var(var: str) -> str | None:
     with open(os.path.join(CMAKE_DIR, "CMakeCache.txt"), encoding='utf-8') as cache_file:
         lines = [
-            l_strip for l in cache_file
-            if (l_strip := l.strip())
-            if not l_strip.startswith(("//", "#"))
+            line_strip for line in cache_file
+            if (line_strip := line.strip())
+            if not line_strip.startswith(("//", "#"))
         ]
 
-    for l in lines:
-        if l.split(":")[0] == var:
-            return l.split("=", 1)[-1]
+    for line in lines:
+        if line.split(":")[0] == var:
+            return line.split("=", 1)[-1]
     return None
 
 
@@ -234,8 +234,8 @@ def cmake_compiler_defines() -> list[str] | None:
 
     os.system("%s -dM -E %s > %s" % (compiler, temp_c, temp_def))
 
-    with open(temp_def) as temp_def_fh:
-        lines = [l.strip() for l in temp_def_fh if l.strip()]
+    with open(temp_def, "r", encoding="utf-8") as temp_def_fh:
+        lines = [line.strip() for line in temp_def_fh if line.strip()]
 
     os.remove(temp_c)
     os.remove(temp_def)
diff --git a/tools/utils_maintenance/clang_format_paths.py b/tools/utils_maintenance/clang_format_paths.py
index 9b9011da858..9aa0580b3bc 100755
--- a/tools/utils_maintenance/clang_format_paths.py
+++ b/tools/utils_maintenance/clang_format_paths.py
@@ -109,16 +109,15 @@ def convert_tabs_to_spaces(files: Sequence[str]) -> None:
 
             # Complex 2 space
             # because some comments have tabs for alignment.
-            def handle(l: str) -> str:
-                ls = l.lstrip("\t")
-                d = len(l) - len(ls)
+            def handle(line: str) -> str:
+                line_strip = line.lstrip("\t")
+                d = len(line) - len(line_strip)
                 if d != 0:
-                    return ("  " * d) + ls.expandtabs(4)
-                else:
-                    return l.expandtabs(4)
+                    return ("  " * d) + line_strip.expandtabs(4)
+                return line.expandtabs(4)
 
             lines = data.splitlines(keepends=True)
-            lines = [handle(l) for l in lines]
+            lines = [handle(line) for line in lines]
             data = "".join(lines)
         with open(f, 'w', encoding="utf-8") as fh:
             fh.write(data)