do something with no errors

src/ragged/api_2022_12/__init__.py

@@ -5,5 +5,7 @@
 from ..common import array as common_array
 
 
-class array(common_array):
-    pass
+class array(common_array):  # pylint: disable=C0103
+    """
+    Ragged array class and constructor for data-apis.org/array-api/2022.12.
+    """

src/ragged/common/__init__.py

@@ -7,7 +7,11 @@
 from ._typing import Device, Dtype, NestedSequence, SupportsDLPack
 
 
-class array:
+class array:  # pylint: disable=C0103
+    """
+    Ragged array class and constructor.
+    """
+
     def __init__(
         self,
         array_like: (
@@ -22,4 +26,6 @@ def __init__(
         dtype: None | Dtype = None,
         device: None | Device = None,
     ):
-        ...
+        assert array_like is not None
+        assert dtype is None
+        assert device is None

src/ragged/common/_typing.py

@@ -14,6 +14,10 @@
 
 
 class NestedSequence(Protocol[T_co]):
+    """
+    Python list of list of ... some type.
+    """
+
     def __getitem__(self, key: int, /) -> T_co | NestedSequence[T_co]:
         ...
 
@@ -25,14 +29,18 @@ def __len__(self, /) -> int:
 
 
 class SupportsDLPack(Protocol):
+    """
+    Array type that supports DLPack.
+    """
+
     def __dlpack__(self, /, *, stream: None = ...) -> PyCapsule:
         ...
 
 
 Device = Union[Literal["cpu"], Literal["cuda"]]
 
 Dtype = np.dtype[
-    (
+    Union[
         np.int8,
         np.int16,
         np.int32,
@@ -43,5 +51,5 @@ def __dlpack__(self, /, *, stream: None = ...) -> PyCapsule:
         np.uint64,
         np.float32,
         np.float64,
-    )
+    ]
 ]

tests/test_0001_initial_array_object.py

@@ -2,8 +2,9 @@
 
 from __future__ import annotations
 
-# import ragged
+import ragged
 
 
-# def test():
-#     a = ragged.array([1, 2, 3])
+def test():
+    a = ragged.array([1, 2, "hello", 3])
+    assert a is not None