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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