aboderinsamuel commented on code in PR #50203:
URL: https://github.com/apache/arrow/pull/50203#discussion_r3477412991
##########
python/pyarrow/array.pxi:
##########
@@ -266,6 +266,26 @@ def array(object obj, type=None, mask=None, size=None,
from_pandas=None,
if type is not None and type.id == _Type_EXTENSION:
extension_type = type
type = type.storage_type
+ # GH-49644: when building a fixed_shape_tensor from a sequence of
arrays,
+ # the converter only sees the flat storage type, so validate the
+ # tensor-specific constraints here where the type is still known.
+ if (isinstance(extension_type, FixedShapeTensorType)
+ and isinstance(obj, Sequence)
+ and not _is_array_like(obj)
+ and not isinstance(obj, (str, bytes, bytearray))):
+ if extension_type.permutation is not None:
+ raise NotImplementedError(
+ "Converting a sequence of arrays to a fixed_shape_tensor
with "
+ "a permutation is not supported; use "
+ "FixedShapeTensorArray.from_numpy_ndarray instead")
Review Comment:
Done, dropped the "use from_numpy_ndarray" part, since it doesn't support
permutation either.
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