[ARROW-2277] [Python] Tensor.from_numpy doesn't support struct arrays

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.8.0
• Component/s: Python
• External issue URL: https://github.com/apache/arrow/issues/18233
• Assignee: Unassigned
• Reporter: Antoine Pitrou
• Created: 06/Mar/18 18:29
• Updated: 11/Jan/23 07:20
• Resolved: 13/Mar/18 16:59

Description

>>> dt = np.dtype([('x', np.int8), ('y', np.float32)])
>>> dt.itemsize
5
>>> arr = np.arange(5*10, dtype=np.int8).view(dt)
>>> pa.Tensor.from_numpy(arr)
Traceback (most recent call last):
  File "<ipython-input-8-744d4c7972b7>", line 1, in <module>
    pa.Tensor.from_numpy(arr)
  File "array.pxi", line 523, in pyarrow.lib.Tensor.from_numpy
  File "error.pxi", line 85, in pyarrow.lib.check_status
ArrowNotImplementedError: /home/antoine/arrow/cpp/src/arrow/python/numpy_convert.cc:250 code: GetTensorType(reinterpret_cast<PyObject*>(PyArray_DESCR(ndarray)), &type)
Unsupported numpy type 20