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Welcome to the CLASS public repository wiki!

This is not the same as the CLASS webpage nor the online html documentation.

For simplicity

Please use Anaconda, which is a Python distribution with graphical installer, and a package manager, that will play nicely with Mac OS X, and remove a lot of problems.

Note that you might encounter an error that reads ValueError: unknown locale: UTF-8 when launching ipython. Please paste these two lines:

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

at the end of your file ~/.bash_profile.

If you know what you are doing, and/or are on a Linux, you can of course use the Python distribution you want.

Table of contents

• Detailed instructions on how to install the code, including notes about installing on Mac OS X 10.9+ and the clang compiler.
• You can find more information on the Python wrapper.
• Problems at compilation, and you don't understand the error message? See the frequently asked questions, and search for the error message.

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• If you want to contribute to the code, please look at the instructions