python PIP：仅安装依赖项
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PIP: Installing only the dependencies
提问by muhuk
I have a script that creates a virtualenv, installs distributeand pipin it and then optionally clones a gitrepo.
我有一个脚本，可以创建一个virtualenv，安装distribute并pip在其中，然后可以选择克隆一个gitrepo。
Now I have the project I will be working on, installed. But its dependencies are not installed. How can I make pipinstall all the dependencies as if I have issued a pip install MyApp?
现在我已经安装了我将要处理的项目。但是没有安装它的依赖项。如何pip安装所有依赖项，就像我已经发布了一样pip install MyApp？
EDIT: Appareantly my question is a duplicate of this one.
编辑：显然我的问题是这个问题的重复。
Not exactly sure but pip install -e .seems to do what I want without too many extra stuff lying around. I'd prefer if my code wasn't linked from site-packagesthough.
不太确定，但pip install -e .似乎可以做我想做的事情，而没有太多额外的东西。如果我的代码没有链接，我更喜欢site-packages。
采纳答案by muhuk
In my package root issuing pip install -e .installs dependencies.
在我的包根发行pip install -e .安装依赖项。
回答by Jakub Kukul
If your dependencies are defined in the setup.pyfile, you can first dump them to an external file using:
如果您的依赖项在setup.py文件中定义，您可以首先使用以下命令将它们转储到外部文件：
python setup.py egg_info
This will list all your dependencies in YOUR_PROJECT.egg-info/requires.txtfile. Then you can install them using pip:
这将列出YOUR_PROJECT.egg-info/requires.txt文件中的所有依赖项。然后您可以使用pip以下方法安装它们：
pip install -r *.egg-info/requires.txt
回答by Lakshman Prasad
You should use the pip requirements file.
您应该使用 pip 要求文件。
Essentially, place all your requirements, one in each line in a file and pass that to pip using the command
本质上，将所有需求放在文件中的每一行中，然后使用命令将其传递给 pip
pip install -r requirements.txt
What more, if you have a standard environment, pip can actually dump such a file from existing installs using the command:
更重要的是，如果您有一个标准环境，pip 实际上可以使用以下命令从现有安装中转储这样的文件：
pip freeze
You can put the file thus generated directly into the pip requirements, and call the previous command from your deployment script.
您可以将这样生成的文件直接放入 pip 需求中，并从您的部署脚本中调用之前的命令。
Pretty cool, isnt it? :)
很酷，不是吗？:)
回答by jfaleiro
To install your project's dependencies (i.e. install_requires+ extra_requires) you have to extract your dependencies using setuptools egg-infoand then install the filtered list of the combined dependencies:
要安装项目的依赖项（即install_requires+ extra_requires），您必须使用 setuptools 提取依赖项egg-info，然后安装组合依赖项的过滤列表：
python setup.py egg_info
pip install `grep -v '^\[' *.egg-info/requires.txt`
