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Add experimental note
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doc/source/whatsnew/v1.5.0.rst

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@@ -54,6 +54,8 @@ initialized with a ``pyarrow.DataType``.
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Most operations are supported and have been implemented using `pyarrow compute <https://arrow.apache.org/docs/python/api/compute.html>`__ functions.
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We recommend installing the latest version of PyArrow to access the most recently implemented compute functions.
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This feature is experimental and may change in a future release.
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.. _whatsnew_150.enhancements.dataframe_interchange:
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DataFrame interchange protocol implementation

pandas/core/arrays/arrow/array.py

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@@ -161,6 +161,11 @@ class ArrowExtensionArray(OpsMixin, ExtensionArray):
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"""
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Pandas ExtensionArray backed by a PyArrow ChunkedArray.
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.. warning::
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ArrowExtensionArray is considered experimental. The implementation and
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parts of the API may change without warning.
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Parameters
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----------
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values : pyarrow.Array or pyarrow.ChunkedArray

pandas/core/arrays/arrow/dtype.py

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@@ -19,6 +19,11 @@ class ArrowDtype(StorageExtensionDtype):
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"""
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An ExtensionDtype for PyArrow data types.
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.. warning::
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ArrowDtype is considered experimental. The implementation and
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parts of the API may change without warning.
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While most ``dtype`` arguments can accept the "string"
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constructor, e.g. ``int64[pyarrow]``, ArrowDtype is useful
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if the data type contains parameters like ``pyarrow.timestamp``.

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