问题描述
如何防止PIP重新下载以前下载的软件包?我正在测试matplotlib的安装，这是一个11MB的软件包，它依赖于多个发行版特定的软件包.每次我运行pip install matplotlib时，它都会重新下载matplotlib.我该如何停止?
How do you prevent PIP from re-downloading previously downloaded packages? I'm testing the install of matplotlib, an 11MB package that depends on several distro-specific packages. Everytime I run pip install matplotlib, it re-downloads matplotlib. How do I stop this?
推荐答案
您可以使用特定的环境变量 PIP_DOWNLOAD_CACHE ，并使其指向要存储软件包的目录.如果要再次安装它们，则将从该目录中获取它们.
You can use a specific environment variable PIP_DOWNLOAD_CACHE and make it point to a directory where your packages will be stored. If they are to be installed again, they will be taken from this directory.
PIP pip --download-cache似乎也有一个附加选项，它应该做类似的事情，但是我从来没有亲自尝试过.对于您的示例，为避免每次都重新下载matplotlib，请执行以下操作:
There seems to be also an additional option for PIP pip --download-cache which ought to do something similar, but I have never tried it myself. For your example, to avoid re-downloading matplotlib every time, you would do the following:
pip install --download-cache /path/to/pip/cache matplotlib
这能回答您的问题吗?
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