diff --git a/CMakeLists.txt b/CMakeLists.txt
index 807ac3b..c8b690d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,6 @@ include_directories(${CMAKE_SOURCE_DIR}/src)
 add_subdirectory(pybind11)
 pybind11_add_module(
   pylibbpf
-
   # Core
   src/core/bpf_program.h
   src/core/bpf_exception.h
@@ -19,15 +18,12 @@ pybind11_add_module(
   src/core/bpf_program.cpp
   src/core/bpf_map.cpp
   src/core/bpf_object.cpp
-
   # Maps
   src/maps/perf_event_array.h
   src/maps/perf_event_array.cpp
-
   # Utils
   src/utils/struct_parser.h
   src/utils/struct_parser.cpp
-
   # Bindings
   src/bindings/main.cpp)
 
diff --git a/examples/execve.py b/examples/execve.py
index c6a3f9f..d47f327 100644
--- a/examples/execve.py
+++ b/examples/execve.py
@@ -1,10 +1,11 @@
 import time
 from ctypes import c_int32, c_int64, c_uint64, c_void_p
 
-from pylibbpf import BpfMap
 from pythonbpf import BPF, bpf, bpfglobal, map, section
 from pythonbpf.maps import HashMap
 
+from pylibbpf import BpfMap
+
 
 @bpf
 @map
diff --git a/pylibbpf/__init__.py b/pylibbpf/__init__.py
index d679661..cac92df 100644
--- a/pylibbpf/__init__.py
+++ b/pylibbpf/__init__.py
@@ -1,14 +1,17 @@
 import logging
+
+from .ir_to_ctypes import convert_structs_to_ctypes, is_pythonbpf_structs
 from .pylibbpf import (
-    BpfObject as _BpfObject,  # C++ object (internal)
-    BpfProgram,
+    BpfException,
     BpfMap,
+    BpfProgram,
     PerfEventArray,
     StructParser,
-    BpfException,
+)
+from .pylibbpf import (
+    BpfObject as _BpfObject,  # C++ object (internal)
 )
 from .wrappers import BpfObjectWrapper
-from .ir_to_ctypes import convert_structs_to_ctypes, is_pythonbpf_structs
 
 logger = logging.getLogger(__name__)
 
diff --git a/pylibbpf/ir_to_ctypes.py b/pylibbpf/ir_to_ctypes.py
index 455dda5..1ad5a71 100644
--- a/pylibbpf/ir_to_ctypes.py
+++ b/pylibbpf/ir_to_ctypes.py
@@ -1,7 +1,8 @@
 import ctypes
-from typing import Dict, Type
-from llvmlite import ir
 import logging
+from typing import Dict, Type
+
+from llvmlite import ir
 
 logger = logging.getLogger(__name__)
 
@@ -54,12 +55,18 @@ def convert_structs_to_ctypes(structs_sym_tab) -> Dict[str, Type[ctypes.Structur
             struct_class = type(
                 struct_name,
                 (ctypes.Structure,),
-                {'_fields_': fields, '__module__': 'pylibbpf.ir_to_ctypes', '__doc__': f'Auto-generated ctypes structure for {struct_name}',
-                 '__repr__': lambda self: (
-                    f"<{struct_name} " +
-                    " ".join(f"{name}={getattr(self, name)}" for name, _ in fields) +
-                    ">"
-                )}
+                {
+                    "_fields_": fields,
+                    "__module__": "pylibbpf.ir_to_ctypes",
+                    "__doc__": f"Auto-generated ctypes structure for {struct_name}",
+                    "__repr__": lambda self: (
+                        f"<{struct_name} "
+                        + " ".join(
+                            f"{name}={getattr(self, name)}" for name, _ in fields
+                        )
+                        + ">"
+                    ),
+                },
             )
 
             ctypes_structs[struct_name] = struct_class
@@ -80,9 +87,9 @@ def is_pythonbpf_structs(structs) -> bool:
 
     first_value = next(iter(structs.values()))
     return (
-        hasattr(first_value, 'ir_type') and
-        hasattr(first_value, 'fields') and
-        hasattr(first_value, 'size')
+        hasattr(first_value, "ir_type")
+        and hasattr(first_value, "fields")
+        and hasattr(first_value, "size")
     )
 
 
diff --git a/pylibbpf/wrappers.py b/pylibbpf/wrappers.py
index 4d231ae..aa7679c 100644
--- a/pylibbpf/wrappers.py
+++ b/pylibbpf/wrappers.py
@@ -13,7 +13,7 @@ class PerfEventArrayHelper:
         callback: Callable,
         struct_name: str = "",
         page_cnt: int = 8,
-        lost_callback: Optional[Callable] = None
+        lost_callback: Optional[Callable] = None,
     ):
         """Open perf buffer with auto-deserialization."""
         from .pylibbpf import PerfEventArray
@@ -24,14 +24,11 @@ class PerfEventArrayHelper:
                 page_cnt,
                 callback,
                 struct_name,
-                lost_callback or (lambda cpu, cnt: None)
+                lost_callback or (lambda cpu, cnt: None),
             )
         else:
             self._perf_buffer = PerfEventArray(
-                self._map,
-                page_cnt,
-                callback,
-                lost_callback or (lambda cpu, cnt: None)
+                self._map, page_cnt, callback, lost_callback or (lambda cpu, cnt: None)
             )
 
         return self
diff --git a/setup.py b/setup.py
index ee8398e..41abc05 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@ import subprocess
 import sys
 from pathlib import Path
 
-from setuptools import Extension, setup, find_packages
+from setuptools import Extension, find_packages, setup
 from setuptools.command.build_ext import build_ext
 
 # Convert distutils Windows platform specifiers to CMake -A arguments