Pip Usage

pip 基本语法😉

pip install SomePackage            # latest version
pip install SomePackage==1.0.4     # specific version
pip install 'SomePackage>=1.0.4'   # minimum version

pip 高级用法👍

编写 package 版本文件 requirements.txt (●’◡’●)

当前已装库 list

pip freeze 可以实现：获得项目运行时，所需安装库的固定版本

pip freeze > requirements.txt

运行该语句后，在项目目录会出现 requirements.txt 其中包含环境中的各种 package

安装语法🎶

pip install -r 将会自动安装 requirements.txt 中的所有 package

pip install -r requirements.txt

requirements.txt 结构

• Comments：A line that begins with # is treated as a comment and ignored.

• Encoding：Requirements files are utf-8 encoding by default

• Line continuations（续行）：A line ending in an unescaped \ is treated as a line continuation

requirements.txt 例

###### Requirements with Version Specifiers ######
#   See https://www.python.org/dev/peps/pep-0440/#version-specifiers
docopt == 0.6.1             # Version Matching. Must be version 0.6.1
keyring >= 4.1.1            # Minimum version 4.1.1
coverage != 3.5             # Version Exclusion. Anything except version 3.5
Mopidy-Dirble ~= 1.1        # Compatible release. Same as >= 1.1, == 1.*

一个例子