typing issues

docs/api-reference/dtypes.md

@@ -6,7 +6,6 @@
       members:
         - Array
         - List
-        - Struct
         - Int64
         - Int32
         - Int16
@@ -15,12 +14,14 @@
         - UInt32
         - UInt16
         - UInt8
+        - Field
         - Float64
         - Float32
         - Boolean
         - Categorical
         - Enum
         - String
+        - Struct
         - Date
         - Datetime
         - Duration

narwhals/dtypes.py

@@ -3,12 +3,13 @@
 from collections import OrderedDict
 from datetime import timezone
 from typing import TYPE_CHECKING
-from typing import Iterator
-from typing import Literal
 from typing import Mapping
-from typing import Sequence
 
 if TYPE_CHECKING:
+    from typing import Iterator
+    from typing import Literal
+    from typing import Sequence
+
     from typing_extensions import Self
 
 
@@ -178,12 +179,10 @@ class Field:
     """
     Definition of a single field within a `Struct` DataType.
 
-    Parameters
-    ----------
-    name
-        The name of the field within its parent `Struct`.
-    dtype
-        The `DataType` of the field's values.
+    Arguments:
+        name: The name of the field within its parent `Struct`.
+        dtype: The `DataType` of the field's values.
+
     """
 
     name: str
@@ -205,6 +204,13 @@ def __repr__(self) -> str:
 
 
 class Struct(DType):
+    """
+    Struct composite type.
+
+    Arguments:
+        fields: The fields that make up the struct. Can be either a sequence of Field objects or a mapping of column names to data types.
+    """
+
     fields: list[Field]
 
     def __init__(