python - 无法使用pip3安装OpenCV

Question

当我试图在 Raspberry Pi 上安装 OpenCV 进行对象检测时，出现了这个错误:

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available open ssl version -OpenSSL 1.1.0f 25 May 2017 (Library: OpenSSL 1.1.0j 20 Nov 2018)

我正在使用 Python 2.7 作为全局版本并安装了 OpenCV 的所有包。

pip 版本:来自/usr/local/lib/python3.6/site-packages (python 3.6) 的 pip 9.0.1

我使用 pip3 install opencv-python 来安装 OpenCV。

这是错误:

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting opencv-python
  Could not fetch URL https://pypi.python.org/simple/opencv-python/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping
  Could not fetch URL https://www.piwheels.org/simple/opencv-python/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping
  Could not find a version that satisfies the requirement opencv-python (from versions: )
No matching distribution found for opencv-python

Answer 1

如果不自己构建 OpenCV，则无法在 Raspberry Pi 上安装它。这就是您收到错误 No matching distribution found for opencv-python 的原因。您必须自己在 Raspberry Pi 上构建它。最新版本还使用 Python 3，您将需要使用它，但应该包含在 Rasbian 镜像中。尝试 python3 --version 找出答案。

这里有一个详细的指南，您可以按照它来构建和安装 OpenCV:https://www.learnopencv.com/install-opencv-4-on-raspberry-pi/

上面的网站还有一个脚本，您可以下载并使用它来更轻松地安装它。