diff --git a/python/pyarrow/types.py b/python/pyarrow/types.py
index 89c3f1a47c788..2bb5cfcf8b739 100644
--- a/python/pyarrow/types.py
+++ b/python/pyarrow/types.py
@@ -289,14 +289,17 @@ def is_map(t):
 def is_decimal(t):
     return t.id in _DECIMAL_TYPES
 
+
 @doc(is_null, datatype="decimal32")
 def is_decimal32(t):
     return t.id == lib.Type_DECIMAL32
 
+
 @doc(is_null, datatype="decimal64")
 def is_decimal64(t):
     return t.id == lib.Type_DECIMAL64
 
+
 @doc(is_null, datatype="decimal128")
 def is_decimal128(t):
     return t.id == lib.Type_DECIMAL128