diff --git a/mashumaro/core/meta/code/builder.py b/mashumaro/core/meta/code/builder.py
index 655cde76..3dcf9d89 100644
--- a/mashumaro/core/meta/code/builder.py
+++ b/mashumaro/core/meta/code/builder.py
@@ -53,7 +53,12 @@
     substitute_type_params,
     type_name,
 )
-from mashumaro.core.meta.types.common import FieldContext, NoneType, ValueSpec, clean_id
+from mashumaro.core.meta.types.common import (
+    FieldContext,
+    NoneType,
+    ValueSpec,
+    clean_id,
+)
 from mashumaro.core.meta.types.pack import PackerRegistry
 from mashumaro.core.meta.types.unpack import (
     SubtypeUnpackerBuilder,
diff --git a/mashumaro/core/meta/helpers.py b/mashumaro/core/meta/helpers.py
index e556c3aa..38f3555b 100644
--- a/mashumaro/core/meta/helpers.py
+++ b/mashumaro/core/meta/helpers.py
@@ -387,9 +387,11 @@ def is_literal(typ: Type) -> bool:
             return type(typ) is typing._LiteralGenericAlias  # type: ignore
     return False
 
+
 def is_local_type(typ: Type) -> bool:
     return "<locals>" in getattr(typ, "__qualname__", "")
 
+
 def not_none_type_arg(
     type_args: Tuple[Type, ...],
     resolved_type_params: Optional[Dict[Type, Type]] = None,
diff --git a/mashumaro/core/meta/types/common.py b/mashumaro/core/meta/types/common.py
index bf6626d2..04221222 100644
--- a/mashumaro/core/meta/types/common.py
+++ b/mashumaro/core/meta/types/common.py
@@ -303,8 +303,10 @@ def expr_or_maybe_none(spec: ValueSpec, new_expr: Expression) -> Expression:
 def random_hex() -> str:
     return str(uuid.uuid4().hex)
 
+
 _PY_VALID_ID_RE = re.compile(r"\W|^(?=\d)")
 
+
 def clean_id(value: str) -> str:
     if not value:
         return "_"