python断网环境 离线安装第三方包，主要依赖pip的相关用法

先看pip的相应参数，命令行执行pip -h,可以看到参数很多：

方法一.在另一台电脑逐一下载相关安装包，在断网主机上依次安装相应安装包

pip download -d F:\ZK\py\whl\py387 xlrd
pip download -d F:\ZK\py\whl\py387 -i https://pypi.doubanio.com/simple/ xlwt
pip download -d F:\ZK\py\whl\py387 -i https://pypi.doubanio.com/simple/ --only-binary=:all: --python-version 38 pandas
pip install --no-index --find-links=F:\ZK\py\whl\py387\ xlrd
pip install --no-index --find-links=F:\ZK\py\whl\py387\ xlwt
pip install --no-index --find-links=F:\ZK\py\whl\py387\ pandas
pip list

命令1：在默认https://pypi.org/simple位置下载xlrd库

命令2：在豆瓣下载xlwt库，速度更快

命令3：下载基于python3.8的pandas库

然后在离线主机上执行以下命令：

命令4-6：从存放了whl的文件夹中，安装相应库

命令7：查看当前安装的库

 

方法二.在已安装python库的电脑上生成库清单，批量下载库，在断网主机上安装相应备份

pip freeze > requirements.txt
pip download -d F:\ZK\py\whl\py387 -i https://pypi.doubanio.com/simple/ -r requirements.txt

然后在离线主机执行以下命令：

pip install --no-index --find-links=F:\ZK\py\whl\py387 -r requirement.txt

方法二，更方便！

 

最后附上pip参数：pip -h

Usage:   
  pip <command> [options]

Commands:
  install                     Install packages.
  download                    Download packages.
  uninstall                   Uninstall packages.
  freeze                      Output installed packages in requirements format.
  list                        List installed packages.
  show                        Show information about installed packages.
  check                       Verify installed packages have compatible dependencies.
  config                      Manage local and global configuration.
  search                      Search PyPI for packages.
  cache                       Inspect and manage pip's wheel cache.
  wheel                       Build wheels from your requirements.
  hash                        Compute hashes of package archives.
  completion                  A helper command used for command completion.
  debug                       Show information useful for debugging.
  help                        Show help for commands.

General Options:
  -h, --help                  Show help.
  --isolated                  Run pip in an isolated mode, ignoring
                              environment variables and user configuration.
  -v, --verbose               Give more output. Option is additive, and can be
                              used up to 3 times.
  -V, --version               Show version and exit.
  -q, --quiet                 Give less output. Option is additive, and can be
                              used up to 3 times (corresponding to WARNING,
                              ERROR, and CRITICAL logging levels).
  --log <path>                Path to a verbose appending log.
  --no-input                  Disable prompting for input.
  --proxy <proxy>             Specify a proxy in the form
                              [user:passwd@]proxy.server:port.
  --retries <retries>         Maximum number of retries each connection should
                              attempt (default 5 times).
  --timeout <sec>             Set the socket timeout (default 15 seconds).
  --exists-action <action>    Default action when a path already exists:
                              (s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.
  --trusted-host <hostname>   Mark this host or host:port pair as trusted,
                              even though it does not have valid or any HTTPS.
  --cert <path>               Path to alternate CA bundle.
  --client-cert <path>        Path to SSL client certificate, a single file
                              containing the private key and the certificate
                              in PEM format.
  --cache-dir <dir>           Store the cache data in <dir>.
  --no-cache-dir              Disable the cache.
  --disable-pip-version-check
                              Don't periodically check PyPI to determine
                              whether a new version of pip is available for
                              download. Implied with --no-index.
  --no-color                  Suppress colored output
  --no-python-version-warning
                              Silence deprecation warnings for upcoming
                              unsupported Pythons.
  --use-feature <feature>     Enable new functionality, that may be backward
                              incompatible.
  --use-deprecated <feature>  Enable deprecated functionality, that will be
                              removed in the future.