v7.0.0b3

This is the release note of v7.0.0b3. See here for the complete list of solved issues and merged PRs.

Highlights

cupy.RawModule has been introduced to allow users access low-level features (CUDA modules).

Dropping Support of Python 2

Due to the end-of-life (EOL) of Python 2 in January 2020, Python 2 support has been dropped in this release. CuPy v6.x continues to support Python 2. See the blog post for details.

New Features

• Add cupy.nanargmin and cupy.nanargmax (#2222, thanks @harshalchaudhari35!)
• Support cuDNN Fused Ops API (#2246)
• Add fallback_mode.ndarray (#2272, thanks @Piyush-555!)
• Add NCCL broadcast (#2303)
• Add take_along_axis (#2314)
• Add cupy.nanmean (#2319, thanks @Piyush-555!)
• Add more cuSolver APIs for dense linear solver (#2320)
• Provide full coverage for NCCL APIs in CuPy (#2325, thanks @leofang!)
• Add cupy.nanvar and cupy.nanstd (#2344, thanks @Piyush-555!)
• Allow getting and setting CUDA kernel attributes (#2369, thanks @leofang, @grlee77 and @andravin!)
• Add cupy.RawModule() (#2389, thanks @leofang!)
• Add diagonal method for cupyx.scipy.sparse.dia_matrix (#2398, thanks @grlee77!)

Enhancements

• Support for shape argument in *_like functions (#2171, thanks @pentschev!)
• Support batched matrix inverse (#2300)
• Add wrapper for numpy.vectorize in fallback_mode (#2350, thanks @Piyush-555!)
• Allow cuFFT plans to be used as a context manager; Set stream before executing cuFFT plans (#2362, thanks @leofang!)
• Raise DeprecationWarning on 0-dim arrays in numpy.nonzero to match NumPy 1.17 behavior (#2394)
• Change check condition of accept_error (#2396)

Bug Fixes

• Make exceptions picklable (#2318)
• Make cupy.tensordot use Tensor Core also in case of compute-capability > 70 (#2328)

Code Fixes

• Fix unused imports and import orders (#2312)
• Fix variable names in tri kernel (#2326)
• Some simplifications using isnan (#2364)
• Small fix of fusion.pyx and docs (#2393, thanks @xuzijian629!)

Documentation

• Add new functions to API reference (#2308)
• Fix for linalg.svd documentation (#2321, thanks @IvanYashchuk!)
• Fix markup in linalg.svd docs (#2323)
• Fix doctest failure related to __array_function__ support (#2352)
• Add 1.17 to supported NumPy versions (#2368)

Tests

• Make wheel of master for CI (#2144)
• Add ChainerCV's tests to pfnCI (#2186)
• Fix tests of linalg.svd (#2338)
• Check return type in test_type_routines.py (#2358)
• Skip some FFT tests on NumPy 1.17.0 due to a NumPy bug (#2363, thanks @grlee77!)
• Remove random.power test with forbidden value (#2375)
• Skip some tests in TestArrayElementwiseOp as temporary fix (#2376)
• Avoid using numpy.nonzero in _make_decorator (#2385)
• Increase numbers of retries for K-S tests (#2397)

Others

• Drop support for Python 2.7 and 3.4 (#2343)