pip的`--no-cache-dir`有什么用? [英] What is pip's `--no-cache-dir` good for?

问题描述

我最近看到Docker文件中使用了--no-cache-dir.我以前从未见过该标志，并且帮助没有对其进行解释:

I've recently seen the --no-cache-dir being used in a Docker file. I've never seen that flag before and the help is not explaining it:

 --no-cache-dir              Disable the cache.

1. 问题:缓存了什么?
2. 问题:缓存的用途是什么?
3. 问题:我为什么要禁用它?

1. Question: What is cached?
2. Question: What is the cache used for?
3. Question: Why would I want to disable it?

推荐答案

1. 已缓存:隐藏存储或将来使用
2. 用于
   • 存储通过pip安装的模块的安装文件(.whl等)
   • 存储源文件(.tar.gz等)，以避免在未到期时重新下载

1. Cached is: store away in hiding or for future use
2. Used for
   • store the installation files(.whl, etc) of the modules that you install through pip
   • store the source files (.tar.gz, etc) to avoid re-download when not expired

• 您的硬盘驱动器上没有空间
• 以前使用意外设置运行pip install
  • 例如:
    • 以前运行export PYCURL_SSL_LIBRARY=nss和pip install pycurl
    • 要重新运行export PYCURL_SSL_LIBRARY=openssl和pip install pycurl --compile --no-cache-dir
    • you don't have space on your hard drive
    • previously run pip install with unexpected settings
      • eg:
        • previously run export PYCURL_SSL_LIBRARY=nss and pip install pycurl
        • want new run export PYCURL_SSL_LIBRARY=openssl and pip install pycurl --compile --no-cache-dir

        文档链接

        https://pip.pypa.io/en/stable/reference /pip_install/#caching – @emredjan https://pip.pypa.io/en/stable/reference/pip_install/-@mikea

        https://pip.pypa.io/en/stable/reference/pip_install/#caching – @emredjan https://pip.pypa.io/en/stable/reference/pip_install/ - @mikea

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