[jira] [Created] (ARROW-17933) SparseCOOTensor raises error when created with zero elements

["Bruce Martin (Jira)" <ji...@apache.org>]

Bruce Martin created ARROW-17933:
------------------------------------

             Summary: SparseCOOTensor raises error when created with zero elements
                 Key: ARROW-17933
                 URL: https://issues.apache.org/jira/browse/ARROW-17933
             Project: Apache Arrow
          Issue Type: Bug
          Components: Python
    Affects Versions: 9.0.0
         Environment: Ubuntu 22, Python 3.10, Pyarrow 9.0.0
            Reporter: Bruce Martin


Using pyarrow, SparseCOOTensor generates an error when created with zero elements.  SparseCSCMatrix and SparseCSRMatrix work fine.

Example:

```
In [24]: pyarrow.__version__
Out[24]: '9.0.0'

In [25]: pyarrow.SparseCSCMatrix.from_scipy(scipy.sparse.csc_matrix(numpy.zeros((2,4)), dtype=numpy.float32)).non_zero_length
Out[25]: 0

In [26]: pyarrow.SparseCSRMatrix.from_scipy(scipy.sparse.csr_matrix(numpy.zeros((2,4)), dtype=numpy.float32)).non_zero_length
Out[26]: 0

In [27]: pyarrow.SparseCOOTensor.from_scipy(scipy.sparse.coo_matrix(numpy.zeros((2,4)), dtype=numpy.float32)).non_zero_length
---------------------------------------------------------------------------
ArrowInvalid                              Traceback (most recent call last)
Cell In [27], line 1
----> 1 pyarrow.SparseCOOTensor.from_scipy(scipy.sparse.coo_matrix(numpy.zeros((2,4)), dtype=numpy.float32)).non_zero_length

File ~/venv/lib/python3.10/site-packages/pyarrow/tensor.pxi:400, in pyarrow.lib.SparseCOOTensor.from_scipy()

File ~/venv/lib/python3.10/site-packages/pyarrow/error.pxi:100, in pyarrow.lib.check_status()

ArrowInvalid: SparseCOOIndex indices must be contiguous
```



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