Installing opencv fails, even though $ brew doctor doesn't have any complaints:
$ brew install opencv
==> Downloading https://github.com/Itseez/opencv/archive/2.4.7.1.tar.gz
Already downloaded: /Library/Caches/Homebrew/opencv-2.4.7.1.tar.gz
==> Patching
patching file cmake/OpenCVFindOpenNI.cmake
Warning: Formula#python is deprecated and will go away shortly.
Error: undefined method `incdir' for #<PythonDependency: "python" []>
| #!/usr/bin/env python | |
| '''Traverses JSON objects to retrieve a secret string. | |
| The JSON objects form a tree structure. The hashes identifying an object's | |
| children are stored in the object's `next` field. Some objects have a | |
| `secret` value, which holds one character. In-order traversal of the object | |
| tree gives the secret string, which when reversed yields the challenge's | |
| solution. | |
| Objects are retrieved from a web server by their hash (see `get_page()`). |