问题
I have already installed opencv 3.0.0 in windows os. I have run the application and have successfully installed it in C:\ drive and have also copied the cv2.pyd file in C:\Python27\Lib\site-packages as I saw in several tutorial videos and
in my Python 2.7.5 Shell i.e IDLE when I type
>>>import cv2
>>>
It shows it has been safely installed and running.
Now I am using Spyder 3.6 as this is the latest version available for my Machine Learning programs but here if I follow the above steps it shows the error
ModuleNotFoundError: No module named 'cv2'
Now I copy the same cv2.pyd file in the path
C:\Users\Chirantan\Documents\WinPython\python-3.6.5.amd64\Lib\site-packages
But the error now is
File "ipython-input-36-c8ec22b3e787", line 1, in
import cv2
ImportError: DLL load failed: %1 is not a valid Win32 application.
I have 2 questions do I have to install a separate opencv for Spyder 3.6 and install it in C:\Users\Chirantan\Documents\WinPython
and copy the cv2.pyd file in C:\Users\Chirantan\Documents\WinPython\python-3.6.5.amd64\Lib\site-packages
In this case it shows an error
File "ipython-input-36-c8ec22b3e787 ", line 1, in
import cv2
ImportError: DLL load failed: %1 is not a valid Win32 application.
How do I solve this problem?
What should be the correct version of opencv to be installed for Spyder 3.6 and where should be the location where it should be saved and ehere should I put the cv2.pyd file?
Any Help Is Appreciated.
No I want to know what should be the correct version of opencv to be installed for Python 3.6 and provided I have an updated numpy that comes with the spyder package i.e winpython package, where should I install and save the correct file opencv in the winpython folder?
回答1:
Go to https://pypi.org/project/opencv-python/
and copy pip install opencv-python
Now open C:\Users\XYZ\...\WinPython folder and open WinPython command prompt which is inside the folder WinPython
Here paste pip install opencv-python and press enter
Next type pip install opencv-contrib-python and press enter.
Voila! Your opencv is installed. Open your Python 3.6.5 Shell and type
>>> import cv2
>>>
It is successfully installed!
回答2:
Open Anaconda prompt then type the command
pip install opencv-python
and this worked fine for me for anaconda 3.
回答3:
It worked well for me. Answer is need to put cv2.pyd file to your virtual environment. Need to put under two folder of envs,
First is under .dll folder and second is under Lib/site-packages
To get cv2.pyd
Download from this link enter link description here and then extract the download file
You will get opencv folder, after that go inside opencv folder like
Downloads\opencv\build\python\2.7
and go one hierarchy deeper in your folder structure depending on your your system architecture; 32- or 64- window version
Copy cv2.pyd
Important: After copying cv2.pyd file to your envs, you need to rename cv2.pyd to _cv2.pyd
来源：https://stackoverflow.com/questions/51077327/import-error-while-importing-cv2-in-spyderpython-3-6