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I have an rails app deployed on heroku. This app depends on one python module, https://github.com/clips/pattern. Based on documentation of pattern, I could install by two ways:

1: cd pattern-2.5; python setup.py install

creating /usr/local/lib/python2.7/site-packages/pattern error: could not create '/usr/local/lib/python2.7/site-packages/pattern': Read-only file system

2: pip install pattern

bash: pip: command not found

Please, advise me how to install pattern. I found a similar question, How to install python module on Heroku cedar stack with Rails, but it just doesn't work for me.

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for your first method, try to use sudo python setup.py install. For your second method, try to install pip. see this link filon.us/slava/?p=189 . Then use :sudo pip install pattern – tqjustc Mar 28 at 18:05
I couldn't use sudo command on heroku. – Chamnap Mar 29 at 1:07
this post may help stackoverflow.com/questions/8591433/… – tqjustc Mar 29 at 1:24
Thanks :). I saw this one as well. I follow and i got Readonly file system. – Chamnap Mar 29 at 1:31

1 Answer

up vote 2 down vote accepted

Buildpacks are the mechanism Heroku uses to build your application including installing dependencies. Pip is not installed by default, the Python buildpack itself pulls this dependency in. You could use the multi-buildpack which allows you to include several buildpacks.

Multi buildpack - https://github.com/ddollar/heroku-buildpack-multi

Python buildpack - https://github.com/heroku/heroku-buildpack-python

Ruby buildpack - https://github.com/heroku/heroku-buildpack-ruby

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