https://blog.csdn.net/wwwlyj123321/article/details/79066226
The file name under the pip command is not supported. To
view the file name and version supported by the current pip command, enter import pip; print(pip.pep425tags.get_supported())
https://blog.csdn.net/qq_38161040/article in the shell /details/88062405
Found that the file name format downloaded above is not supported, modify it to:
opencv_python-3.1.0.5-cp27-cp27mu-manylinux1_x86_64.whl
然后
pip install opencv_python-3.1.0.5-cp27-cp27mu-manylinux1_x86_64.whl
Successful installation!