尝试在 Windows 10 上使用 pip 安装 opencv-python 时出错

Question

I have been trying to install opencv for Python 3.8.0 on fresh install of Windows 10. Here is the command I ran:

C:\Windows\system32>py -m pip install opencv-python

However, I was met with this error:

ERROR: Could not find a version that satisfies the requirement opencv-python (from versions: none)
ERROR: No matching distribution found for opencv-python

I have tried:

• Running the command prompt as admin
• Upgrading pip using py -m pip install --upgrade pip
• Checking to make sure I was able to install other libraries with pip. (I tried discord.py and Pillow , all worked)

Answer 1

opencv-python is a collection of pre-built whl files, as you can see in the project description on the pypi page :

OpenCV on Wheels

Unofficial pre-built OpenCV packages for Python.

And is the case for many modules currently, there are no whl files for python 3.8 in that project.

So simply install a different python version and try again with

pip install opencv-python

or

download the whl for python 3.8 from here and then do

pip install opencv_python‑4.1.2‑cp38‑cp38‑win_amd64.whl