conda create -n opencv python=3.7

使用conda create -n opencv python=3.7命令可以创建一个名为opencv的虚拟环境，并使用Python 3.7版本。这样可以避免在ROS系统中安装OpenCV时与Python 2.7或Python 3.7产生冲突。在创建好虚拟环境后，可以通过conda activate opencv命令激活该虚拟环境，进入opencv环境。然后可以使用pip install opencv-python==3.4.2.17命令安装所需的OpenCV库的指定版本。如果你使用的是PyCharm，还需要将环境切换到新创建的虚拟环境下，以便能够在PyCharm中使用该环境。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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