python/django：部署到heroku失败

Question

我想部署一个应用程序到heroku。 这是一个python/django应用程序，它在我的本地机器上运行良好。

部署时，heroku会下载requirements.txt中定义的包，但会停止抱怨qpython无法建立，因为它找不到numpy。但是从日志输出中可以看出numpy正在被下载，并且在qpython之前安装。

我能想到的唯一的事情是日志实际上是说 “收集”和“下载”，但不明确“安装”...可能是因为Heroku处理这种方式导致qpython之前建立numpy正在安装？这是一个奇怪的假设，但我能想到的只有一个。无论如何，我不知道该怎么做。

我将python定义为runtime.txt中的python 2.7.12。

$ git push heroku-dev django6_12:master 
Counting objects: 21, done. 
Delta compression using up to 4 threads. 
Compressing objects: 100% (20/20), done. 
Writing objects: 100% (21/21), 1.99 KiB | 0 bytes/s, done. 
Total 21 (delta 16), reused 0 (delta 0) 
remote: Compressing source files... done. 
remote: Building source: 
/*...more output omitted for brevity */ 
remote: -----> Python app detected 
remote: -----> Installing python-2.7.12 
remote: -----> Noticed cffi. Bootstrapping libffi. 
remote:  $ pip install -r requirements.txt 
/*...more output omitted for brevity */ 
remote:  Collecting nodeenv==0.7.2 (from -r requirements.txt (line 36)) 
remote:   Downloading nodeenv-0.7.2.tar.gz 
remote:  Collecting numpy==1.8.1 (from -r requirements.txt (line 37)) 
remote:   Downloading numpy-1.8.1-cp27-cp27m-manylinux1_x86_64.whl (14.6MB) 
remote:  Collecting pandas==0.14.0 (from -r requirements.txt (line 38)) 
remote:   Downloading pandas-0.14.0.zip (7.3MB) 
/*...more output omitted for brevity 
**Note how numpy is being installed** */ 
remote:  Collecting qpython==1.0.0 (from -r requirements.txt (line 112)) 
remote:   Downloading qPython-1.0.0.zip (75kB) 
remote:   Complete output from command python setup.py egg_info: 
remote:   Traceback (most recent call last): 
remote:    File "<string>", line 1, in <module> 
remote:    File "/tmp/pip-build-NoEaTG/qpython/setup.py", line 19, in <module> 
remote:    import numpy 
remote:   ImportError: No module named numpy 
remote:    
remote:   ---------------------------------------- 
remote:  Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-NoEaTG/qpython/ 
remote: !  Push rejected, failed to compile Python app. 



$ git push heroku-dev django6_12:master 
Counting objects: 21, done. 
Delta compression using up to 4 threads. 
Compressing objects: 100% (20/20), done. 
Writing objects: 100% (21/21), 1.99 KiB | 0 bytes/s, done. 
Total 21 (delta 16), reused 0 (delta 0) 
remote: Compressing source files... done. 
remote: Building source: 
/*...more output omitted for brevity */ 
remote: -----> Python app detected 
remote: -----> Installing python-2.7.12 
remote: -----> Noticed cffi. Bootstrapping libffi. 
remote:  $ pip install -r requirements.txt 
/*...more output omitted for brevity */ 
remote:  Collecting nodeenv==0.7.2 (from -r requirements.txt (line 36)) 
remote:   Downloading nodeenv-0.7.2.tar.gz 
remote:  Collecting numpy==1.8.1 (from -r requirements.txt (line 37)) 
remote:   Downloading numpy-1.8.1-cp27-cp27m-manylinux1_x86_64.whl (14.6MB) 
remote:  Collecting pandas==0.14.0 (from -r requirements.txt (line 38)) 
remote:   Downloading pandas-0.14.0.zip (7.3MB) 
/*...more output omitted for brevity 
**Note how numpy is being installed** */ 
remote:  Collecting qpython==1.0.0 (from -r requirements.txt (line 112)) 
remote:   Downloading qPython-1.0.0.zip (75kB) 
remote:   Complete output from command python setup.py egg_info: 
remote:   Traceback (most recent call last): 
remote:    File "<string>", line 1, in <module> 
remote:    File "/tmp/pip-build-NoEaTG/qpython/setup.py", line 19, in <module> 
remote:    import numpy 
remote:   ImportError: No module named numpy 
remote:    
remote:   ---------------------------------------- 
remote:  Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-NoEaTG/qpython/ 
remote: !  Push rejected, failed to compile Python app. 

Answer 1

就像它说的那样，你需要安装numpy（它不会安装在使用pip的heroku上）。

你必须使用一个buildpack在您的Heroku应用程式安装numpy的：

https://github.com/thenovices/heroku-buildpack-scipy