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cannot import scipy with WinPython 2020-01 on Windows 10 #828
Description
here's what I get in both Python 3.8.2 and 3.7.7 after executing import scipy:
Traceback (most recent call last):
File "<ipython-input-1-4363d2be0702>", line 1, in <module>
import scipy
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\__init__.py", line 156, in <module>
from . import fft
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\fft\__init__.py", line 76, in <module>
from ._basic import (
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\fft\_basic.py", line 1, in <module>
from scipy._lib.uarray import generate_multimethod, Dispatchable
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\_lib\uarray.py", line 27, in <module>
from ._uarray import *
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\_lib\_uarray\__init__.py", line 114, in <module>
from ._backend import *
File "C:\WPy64-3820\python-3.8.2.amd64\lib\site-packages\scipy\_lib\_uarray\_backend.py", line 15, in <module>
from . import _uarray # type: ignore
ImportError: DLL load failed while importing _uarray: The specified module could not be found.
Activity
stonebig commentedon Apr 5, 2020
Hum, that is strange. Are you on Windows 10 ?
stonebig commentedon Apr 5, 2020
I found someone with the opposite problem ... maybe try the opposite, try with Anaconda
numpy/numpy#12957 (comment)
Another internet suggests maybe your path variable is too long
dlzcn commentedon Apr 8, 2020
Run perfectly on my PC, but failed with same errors on my laptop. Both of them are running Windows 10. I checked length of the path variable on my PC, it is 1715 characters. Not sure the size of the variable on my laptop.
stonebig commentedon Apr 8, 2020
Hum, maybe search then try your question on stackoverflow.
Another shot in the dark would be to retry after moving your directory:
other ideas are: another Python system installed create troubles, your initial installation has lost a dll, ...
stonebig commentedon Apr 8, 2020
are you using pycharm ? psycopg/psycopg2#1014 (comment)
stonebig commentedon Apr 8, 2020
hum, that may just be a python-3.8 change : now, Python- 3.8 doesn't look for a dll out of system unless explicitly told.
as a blind guess, I suggest you retry with a python-3.7 distribution, as it tackles DLL differently
dlzcn commentedon Apr 8, 2020
Switched to python-3.7 distriubtion.
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\sklearn_init_.py", line 82, in
from .base import clone
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\sklearn\base.py", line 20, in
from .utils import IS_32BIT
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\sklearn\utils_init.py", line 20, in
from scipy.sparse import issparse
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy_init_.py", line 156, in
from . import fft
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy\fft_init_.py", line 76, in
from ._basic import (
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy\fft_basic.py", line 1, in
from scipy._lib.uarray import generate_multimethod, Dispatchable
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy_lib\uarray.py", line 27, in
from .uarray import *
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy_lib_uarray_init.py", line 114, in
from ._backend import *
File "D:\python\WPy64-3770\python-3.7.7.amd64\lib\site-packages\scipy_lib_uarray_backend.py", line 15, in
from . import _uarray # type: ignore
ImportError: DLL load failed: The specified module could not be found.
stonebig commentedon Apr 8, 2020
Well, I'm out of ideas at the moment. Having a working PC and a not-working Laptop shall allow you to enumerate what's different between them: tiny memory, very very slow processor, another Python distro, a virulant anti-virus, ...
dlzcn commentedon Apr 8, 2020
It's VC runtime issue, happens one of them is missing from my PC. Fixed after installing the lastest file from https://support.microsoft.com/en-gb/help/2977003/the-latest-supported-visual-c-downloads
Maybe need to update the instructions. Win10 users also need to pay attention to this requirement.
makazhan commentedon Apr 8, 2020
Thanks! It fixed the issue on my laptop Win10 for both Python 3.7 and 3.8.
stonebig commentedon Apr 8, 2020
hum, I include vcruntime140.dll . I may have missed some news ? ... yes
I'll include it, not sure if it's of help, or if anyway the download is needed.
there is a whole list of dlls now, not sure what to do of them:
ok ,"d" is for debug: https://stackoverflow.com/questions/39010509/vcruntime140-dll-vs-vcruntime140d-dll
dll issue mitigation
stonebig commentedon Apr 8, 2020
So the vcruntime140_1.dll will be in next binaries, even if I'm not sure it solves the problem.
It's a bit odd to have every user needing to install a microsoft executable.
per caution, suggesting windows 10 users may have to do it too
stonebig commentedon Apr 8, 2020
two actions done. Hope it will help. Thanks a lot @dlzcn for the inquiry.
what tool did you use to see the dll missing ?
https://stackoverflow.com/questions/7378959/how-to-check-for-dll-dependency
dlzcn commentedon Apr 8, 2020
I am using dependencies, you can fine it from https://lucasg.github.io/Dependencies/
stonebig commentedon Apr 8, 2020
Ok, thanks again.