Conda offers you the flexibility of being able to build things
that are not Python related. The first 2 sample recipes,
libtiff, are examples of non-Python libraries, meaning
they do not require Python to run or build.
boost is an example of a popular programming library and illustrates the use of selectors in a recipe.
libtiff is another example of a compiled library, which shows how conda can apply patches to source directories before building the package.
msgpack, blosc, and cytoolz are examples of Python libraries with extensions.
toolz, sympy, six, and gensim are examples of Python-only libraries.
gensim works on Python 2, and all of the others work on both Python 2 and Python 3.