无法安装 OpenCV python3.8

Question

当我执行此命令时：

pip3 install opencv-python

我收到以下错误：

  Installing build dependencies ... error                            ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 /usr/lib/python3/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-z4c_sn6u/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel scikit-build cmake pip 'numpy==1.11.3; python_version=='"'"'3.5'"'"'' 'numpy==1.13.3; python_version=='"'"'3.6'"'"'' 'numpy==1.14.5; python_version=='"'"'3.7'"'"'' 'numpy==1.17.3; python_version>='"'"'3.8'"'"''       cwd: None
  Complete output (22 lines):
  Ignoring numpy: markers 'python_version == "3.5"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.6"' don't match your environment
  Ignoring numpy: markers 'python_version == "3.7"' don't match your environment
  Collecting setuptools
    Downloading setuptools-49.6.0-py3-none-any.whl (803 kB)
  Collecting wheel
    Downloading wheel-0.35.0-py2.py3-none-any.whl (24 kB)
  Collecting scikit-build
    Using cached scikit_build-0.11.1-py2.py3-none-any.whl (72 kB)
  Collecting cmake
    Using cached cmake-3.18.0.tar.gz (28 kB)
      ERROR: Command errored out with exit status 1:
       command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-95tsmt_u/cmake/setup.py'"'"'; __file__='"'"'/tmp/pip-install-95tsmt_u/cmake/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-95tsmt_u/cmake/pip-egg-info
           cwd: /tmp/pip-install-95tsmt_u/cmake/
      Complete output (5 lines):
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "/tmp/pip-install-95tsmt_u/cmake/setup.py", line 7, in <module>
          from skbuild import setup
      ModuleNotFoundError: No module named 'skbuild'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  ----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python3 /usr/lib/python3/dist-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-z4c_sn6u/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel scikit-build cmake pip 'numpy==1.11.3; python_version=='"'"'3.5'"'"'' 'numpy==1.13.3; python_version=='"'"'3.6'"'"'' 'numpy==1.14.5; python_version=='"'"'3.7'"'"'' 'numpy==1.17.3; python_version>='"'"'3.8'"'"'' Check the logs for full command output.

当我尝试安装 ecapture 时也是如此，我使用的是最新的 python 版本

Answer 1

尝试升级您的 pip

pip install --upgrade pip

然后运行

pip install opencv-python

Answer 2

pypi 网站上的安装和使用指南说

Pip 安装因 ModuleNotFoundError 失败：没有名为“skbuild”的模块？

从 opencv-python 4.3.0.* 版本开始，manylinux1 轮子被 manylinux2014 轮子取代。如果你的pip太旧，它会尝试使用4.3.0.38中引入的新源码发行版手动构建OpenCV，因为它不知道如何安装manylinux2014轮子。但是，由于 pip 太旧，源构建也会失败，因为它不了解 pyproject.toml 中的构建依赖项。要使用新的 manylinux2014 预构建轮子（或从源代码构建），您的 pip 版本必须 >= 19.3。
请升级pip
pip install --upgrade pip

Answer 3

我面临着类似的情况：

Dockerfile：

FROM nvidia/cuda:10.0-cudnn7-runtime-ubuntu18.04

RUN apt-get update -y
RUN apt-get install -y vim curl iputils-ping python3-dev python3-pip libsm6 
libxext6 libxrender-dev python3.6
RUN pip3 install -r /requirements.txt
...

要求.txt：

...
opencv-python
...

运行后docker-compose up &，我收到此错误：

 Traceback (most recent call last):
   File "<string>", line 1, in <module>
   File "/tmp/pip-build-acog3xol/opencv-python/setup.py", line 9, in <module>
     import skbuild
 ModuleNotFoundError: No module named 'skbuild'

我尝试了建议的升级解决方案，pip3但遇到了同样的问题。

对我有用的是opencv-python在requirements.txt. 以前，它是拉版本4.4.0.40. 我改为requirements.txt：

...
opencv-python==4.2.0.34
...