如何在heroku节点服务器上添加python依赖项？

问题描述

我有一个运行Node的Heroku应用，但我需要能够在此服务器上运行Python脚本。我正在尝试安装我的Python依赖项，但无法使其正常工作。

I have a Heroku app that's running Node, but I need to be able to run Python scripts on this server. I'm trying to install my Python dependencies but can't get it to work.

我已经在项目中添加了python和node build包，创建一个虚拟环境并成功安装了requirements.txt，但是我继续遇到找不到模块的错误。

I've added both python and node build packs to my project, I've create a virtual environment and successfully installed requirements.txt, but I continue to get module not found errors.

如何在Heroku Node服务器上正确安装Python软件包？

How can I properly install Python packages on a Heroku Node server?

Heroku显示我已经正确设置了两个buildpack：

Heroku shows that I have correctly set both buildpacks:

heroku buildpacks --app <my app>

输出：

1. heroku/nodejs
2. heroku/python

如果我尝试安装Requirements.txt：

If I try to install requirements.txt:

$ pip install -r requirements.txt

说要求已经满足。我猜这与我的本地环境有关。

It says the requirements are already satisfied. I'm guessing this is in reference to my local environment.

Requirement already satisfied (use --upgrade to upgrade): requests==2.7.0 in /Library/Python/2.7/site-packages (from -r requirements.txt (line 1))
Requirement already satisfied (use --upgrade to upgrade): beautifulsoup4==4.5.3 in /Library/Python/2.7/site-packages (from -r requirements.txt (line 2))

但是如果我尝试运行Python脚本，则会出现无模块错误：

But if I try to run my Python script, I get a no module error:

推荐答案

我已经解决了它：

1. 我创建了（如果没有）文件 requirements.txt直接进入入口点的根目录（在我的情况下为index.js）



2. 我手动添加了具有特定版本的库进入文件，在我的情况下是这样的：

1. I created (If there is not) the file "requirements.txt" directly into the root of the entrypoint (index.js, in my case)

2. I manually added the libraries with the specific versions into the file, in my case like this:

requests==2.7.0
beautifulsoup4==4.5.3

我使用以下命令创建了 runtime.txt文件（如果没有）一行：我需要的python版本：

I created (If there is not) the file "runtime.txt" with with just one line: the python version i need, in my case:

python-2.7.14

我使用以下两个命令创建了multibuildpack：

I created the multibuildpacks with the two commands:

heroku buildpacks:set heroku/python
heroku buildpacks:add --index 1 heroku/nodejs

最后，我继续执行git命令：

Finally, I continued with the git commands:

git add requirements.txt runtime.txt
git commit requirements.txt runtime.txt -m "requirements"
git push heroku master

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