安装
第一步、更新：
sudo apt-get update
sudo apt-get upgrade
第二步、安装：
apt-get install python-pip
如果是 Python3 请使用：
apt-get install python3-pip
第三步、检查是否安转成功：
pip3 -V
使用
pip 的命令行参数及说明：
Usage:
pip <command> [options]
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
/home/toby/.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.
