在学习python爬虫的时候需要用到一个builtwith模块，但是我在导入的时候发现没有这个模块，就需要下载这个模块， 有一个很好的工具叫pip，这是python软件包的管理工具，可以安装，卸载，更新软件包。下面让我们一起来看看这个工具把

1：下载并安装pip

[root@python love]# wget "https://pypi.python.org/packages/source/p/pip/pip-1.5.4.tar.gz#md5=834b2904f92d46aaa333267fb1c922bb" --no-check-certificate
[root@python love]# tar -zxf pip-1.5.4.tar.gz
[root@python love]# cd pip-1.5.4
[root@python love]# python setup.py install

2：使用pip下载builtwith包

[root@python love]# pip install builtwith

用法：

pip <command> [options]

下边的是通过 [root@python love]# pip --help得到的

Commands:
  install                     Install packages.
  uninstall                   Uninstall packages.
  freeze                      Output installed packages in requirements format.
  list                        List installed packages.
  show                        Show information about installed packages.
  search                      Search PyPI for packages.
  wheel                       Build wheels from your requirements.
  zip                         DEPRECATED. Zip individual packages.
  unzip                       DEPRECATED. Unzip individual packages.
  bundle                      DEPRECATED. Create pybundles.
  help                        Show help for commands.

General Options:
  -h, --help                  Show help.
  -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.
  --log-file <path>           Path to a verbose non-appending log, that only logs
                              failures. This log is active by default at
                              /root/.pip/pip.log.
  --log <path>                Path to a verbose appending log. This log is inactive by
                              default.
  --proxy <proxy>             Specify a proxy in the form
                              [user:passwd@]proxy.server:port.
  --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.
  --cert <path>               Path to alternate CA bundle

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python软件包管理工具pip的简单使用和说明