cupy-6.0.0 fails to import on Python 3.8.0b1 for Windows

Just a heads-up: using CuPy 6.0.0 built from source with Cython-0.29.10 and CUDA 10.1 on Python 3.8.0b1, Windows 10, cupy fails to import (at least on my system, traceback below). This is due to a change of the DLL resolution on that platform. A quick workaround if CUDA_PATH is defined:

diff --git a/cupy/__init__.py b/cupy/__init__.py
index 006e60cc3..8d4973193 100644
--- a/cupy/__init__.py
+++ b/cupy/__init__.py
@@ -6,6 +6,11 @@ import six

 from cupy import _version

+try:
+    import os
+    os.add_dll_directory(os.path.join(os.environ['CUDA_PATH'], 'bin'))
+except Exception:
+    pass

 try:
     from cupy import core  # NOQA

> python.exe -c"import cupy"
Traceback (most recent call last):
  File "X:\Python38\lib\site-packages\cupy\__init__.py", line 11, in <module>
    from cupy import core  # NOQA
  File "X:\Python38\lib\site-packages\cupy\core\__init__.py", line 1, in <module>
    from cupy.core import core  # NOQA
  File "cupy\core\core.pyx", line 1, in init cupy.core.core
  File "X:\Python38\lib\site-packages\cupy\cuda\__init__.py", line 4, in <module>
    from cupy.cuda import compiler  # NOQA
  File "X:\Python38\lib\site-packages\cupy\cuda\compiler.py", line 11, in <module>
    from cupy.cuda import device
  File "cupy\cuda\runtime.pxd", line 8, in init cupy.cuda.device
ImportError: DLL load failed: The specified module could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "X:\Python38\lib\site-packages\cupy\__init__.py", line 32, in <module>
    six.reraise(ImportError, ImportError(msg), exc_info[2])
  File "X:\Python38\lib\site-packages\six.py", line 692, in reraise
    raise value.with_traceback(tb)
  File "X:\Python38\lib\site-packages\cupy\__init__.py", line 11, in <module>
    from cupy import core  # NOQA
  File "X:\Python38\lib\site-packages\cupy\core\__init__.py", line 1, in <module>
    from cupy.core import core  # NOQA
  File "cupy\core\core.pyx", line 1, in init cupy.core.core
  File "X:\Python38\lib\site-packages\cupy\cuda\__init__.py", line 4, in <module>
    from cupy.cuda import compiler  # NOQA
  File "X:\Python38\lib\site-packages\cupy\cuda\compiler.py", line 11, in <module>
    from cupy.cuda import device
  File "cupy\cuda\runtime.pxd", line 8, in init cupy.cuda.device
ImportError: CuPy is not correctly installed.

If you are using wheel distribution (cupy-cudaXX), make sure that the version of CuPy you installed matches with the version of CUDA on your host.
Also, confirm that only one CuPy package is installed:
  $ pip freeze

If you are building CuPy from source, please check your environment, uninstall CuPy and reinstall it with:
  $ pip install cupy --no-cache-dir -vvvv

Check the Installation Guide for details:
  https://docs-cupy.chainer.org/en/latest/install.html

original error: DLL load failed: The specified module could not be found.

[C9KenData]

went to environmental variable, added the bin path and i can import cupy now. gracias

[dome272]

Im getting the same issue as @cgohlke I installed cuda 10.2 and installed pip install cupy-cuda102 --no-cache-dir -vvvv (Initially I installed just pip install cupy-cuda102 but it didnt work either) Furthermore Im using Python 3.6.5 Error: `

import cupy Traceback (most recent call last): File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy_init_.py”, line 21, in <module> from cupy import core # NOQA File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\core_init_.py”, line 1, in <module> from cupy.core import core # NOQA File “cupy\core\core.pyx”, line 1, in init cupy.core.core File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\cuda_init_.py”, line 5, in <module> from cupy.cuda import compiler # NOQA File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\cuda\compiler.py”, line 13, in <module> from cupy.cuda import device File “cupy\cuda\runtime.pxd”, line 8, in init cupy.cuda.device ImportError: DLL load failed: The specified module could not be found. During handling of the above exception, another exception occurred: Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy_init_.py”, line 42, in <module> six.reraise(ImportError, ImportError(msg), exc_info[2]) File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\six.py”, line 702, in reraise raise value.with_traceback(tb) File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy_init_.py”, line 21, in <module> from cupy import core # NOQA File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\core_init_.py”, line 1, in <module> from cupy.core import core # NOQA File “cupy\core\core.pyx”, line 1, in init cupy.core.core File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\cuda_init_.py”, line 5, in <module> from cupy.cuda import compiler # NOQA File “C:\Users\youre\AppData\Local\Programs\Python\Python36\lib\site-packages\cupy\cuda\compiler.py”, line 13, in <module> from cupy.cuda import device File “cupy\cuda\runtime.pxd”, line 8, in init cupy.cuda.device ImportError: CuPy is not correctly installed. If you are using wheel distribution (cupy-cudaXX), make sure that the version of CuPy you installed matches with the version of CUDA on your host. Also, confirm that only one CuPy package is installed: $ pip freeze If you are building CuPy from source, please check your environment, uninstall CuPy and reinstall it with: $ pip install cupy --no-cache-dir -vvvv Check the Installation Guide for details: https://docs-cupy.chainer.org/en/latest/install.html original error: DLL load failed: The specified module could not be found. `

As suggested maybe it has something to do with the env variables but Im not sure what I should edit there. The CUDA_PATH seems to be set C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.2

Any help would be appreciated…