Anaconda安装OpenCV没有自动代码补全

Posted 2021-01-26

（1）错误描述

出现这种错误OpenCV3.0 和 4.0 都是一样的，不是版本导致的问题，不要在版本中挣扎啦！

最省心最安全最简洁的方式就是下载Anaconda+OpenCV再安装，别用单独的Python了...Python的Python和Anaconda的Python还是有一点点不一样...况且你都用OpenCV做项目了，那不得更加换成Anaconda了吗...

（2）Anaconda4.5.11安装OpenCV4.0.0

• 查看当前Anaconda的版本和包含的Python解释器的版本：

D:DevKitsAnaconda3Scripts>conda info

     active environment : None
       user config file : C:UsersSeven.condarc
 populated config files : C:UsersSeven.condarc
          conda version : 4.5.11
    conda-build version : 3.15.1
         python version : 3.7.0.final.0
       base environment : D:DevKitsAnaconda3  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/win-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/win-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/win-64
                          https://repo.anaconda.com/pkgs/pro/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : D:DevKitsAnaconda3pkgs
                          C:UsersSevenAppDataLocalcondacondapkgs
       envs directories : D:DevKitsAnaconda3envs
                          C:UsersSevenAppDataLocalcondacondaenvs
                          C:UsersSeven.condaenvs
               platform : win-64
             # 由此可知Ananconda的版本是4.5.11, Python的版本的3.7.0
             user-agent : conda/4.5.11 requests/2.19.1 CPython/3.7.0 Windows/10 Windows/10.0.17763
          administrator : False
             netrc file : None
           offline mode : False

• 下载地址：https://www.lfd.uci.edu/~gohlke/pythonlibs

• 下载如下文件：

# OpenCV的核心包
opencv_python?4.0.0?cp37?cp37m?win_amd64.whl
# OpenCV的核心包+扩展包
opencv_python?4.0.0+contrib?cp37?cp37m?win_amd64.whl

• 离线安装：

D:DevKitsAnaconda3Scripts>pip.exe install C:UsersSevenDownloadsopencv_python-4.0.0+contrib-cp37-cp37m-win_amd64.whl
Processing c:userssevendownloadsopencv_python-4.0.0+contrib-cp37-cp37m-win_amd64.whl
Installing collected packages: opencv-python
    Successfully uninstalled opencv-python-4.0.0
Successfully installed opencv-python-4.0.0+contrib

• 测试安装：

>>> import cv2
>>> cv2.__version__
‘4.0.0‘

（3）解决完成后

（4）问题原因

无论是OpenCV3还是OpenCV4，都遇到了同样的问题...当你是用pip安装OpenCV的时候，在PyCharm或VisualStudio中可能不会有代码提示...需要在线安装是可以的，但是步骤麻烦...我就没写...在线安装时pip将OpenCV安装到了Lib/site-packages/cv2中了，而使用离线安装的方式直接安装到Lib/site-packages中，那么：如果采用的在线安装有两种解决方案：

方案一：

在cv2目录中，打开__init__.py文件，修改如下：

sys.modules[‘cv2‘] = cv2

方案二：

导包时使用这样的方式：

from cv2 import cv2 as cv

• Tips: 如果不是Anaconda安装的Python，Python会在Lib目录查找.