Resolve: [Good First Issue][Keras 3 OpenVINO Backend]: Support numpy.linspace operation #29485

[VLTisME]

Reduced failed tests to 2 failed and 12 skipped.
two left unsolved failed tests:
1/
start = 0, stop = 10, num = <tf.Tensor: shape=(), dtype=int32, numpy=5>
endpoint = True, retstep = False, dtype = None, axis = 0

@keras_export(["keras.ops.linspace", "keras.ops.numpy.linspace"])
def linspace(start, stop, num=50, endpoint=True, retstep=False, dtype=None, axis=0, *, device=None):
    # Validate num
    if not isinstance(num, int):

      raise TypeError("num must be an integer")

E TypeError: num must be an integer

2/

  arrays = [np.empty(x, dtype=[]) for x in args]

E TypeError: 'NoneType' object cannot be interpreted as an integer

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[VLTisME]

@rkazants may you review this?

[VLTisME]

I have collected some errors, gonna fix it:
1/

      start_np, stop_np = np.broadcast_arrays(start.numpy(), stop.numpy())

E AttributeError: 'OpenVINOKerasTensor' object has no attribute 'numpy'
2/

      start_np, stop_np = np.broadcast_arrays(start.numpy(), stop.numpy())

E AttributeError: 'numpy.ndarray' object has no attribute 'numpy'. Did you mean: 'dump'?
3/
if backend.shape(start) == () and backend.shape(stop) == ():
result = start + indices * step
else:

      start_np, stop_np = np.broadcast_arrays(start.numpy(), stop.numpy())

E AttributeError: 'jaxlib.xla_extension.ArrayImpl' object has no attribute 'numpy'
4/
def linspace(start, stop, num=50, endpoint=True, retstep=False, dtype=None, axis=0, *, device=None):
if not isinstance(num, int):

      raise TypeError("num must be an integer")

E TypeError: num must be an integer
5/

arrays = [np.empty(x, dtype=[]) for x in args]
E TypeError: 'NoneType' object cannot be interpreted as an integer

[rkazants]

incorrect file is modified. You need to update https://github.com/keras-team/keras/blob/master/keras/src/backend/openvino/numpy.py

[rkazants]

please remove this file. It is needed only for developer purpose

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

Project coverage is 80.08%. Comparing base (44a655b) to head (95ed578).

Files with missing lines	Patch %	Lines
keras/src/backend/openvino/numpy.py	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21140      +/-   ##
==========================================
- Coverage   82.74%   80.08%   -2.66%     
==========================================
  Files         564      564              
  Lines       54199    54218      +19     
  Branches     8418     8424       +6     
==========================================
- Hits        44845    43419    -1426     
- Misses       7283     8788    +1505     
+ Partials     2071     2011      -60     

Flag	Coverage Δ
keras	79.89% <0.00%> (-2.66%)	⬇️
keras-jax	63.93% <0.00%> (-0.03%)	⬇️
keras-numpy	59.04% <0.00%> (-0.03%)	⬇️
keras-openvino	?
keras-tensorflow	64.31% <0.00%> (-0.03%)	⬇️
keras-torch	64.01% <0.00%> (-0.03%)	⬇️

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[rkazants]

@VLTisME, please fix test failures, see CI logs:

FAILED keras/src/ops/numpy_test.py::NumpyTwoInputOpsCorrectnessTest::test_linspace - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'
FAILED keras/src/ops/numpy_test.py::NumpyDtypeTest::test_linspace_[0, 10]_0_bfloat16 - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'
FAILED keras/src/ops/numpy_test.py::NumpyDtypeTest::test_linspace_[0, 10]_0_float16 - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'
FAILED keras/src/ops/numpy_test.py::NumpyDtypeTest::test_linspace_[0, 10]_0_float32 - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'
FAILED keras/src/ops/numpy_test.py::NumpyDtypeTest::test_linspace_[0, 10]_0_float64 - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'
FAILED keras/src/ops/numpy_test.py::NumpyDtypeTest::test_linspace_[0, 10]_0_none - TypeError: unsupported operand type(s) for -: 'openvino._pyopenvino.Output' and 'openvino._pyopenvino.Output'