Our CI environment provides multiple runtimes (e.g. Node.js or PHP versions), data stores and so on. Because of this, hosting your project on travis-ci.org means you can effortlessly test your library or applications against multiple runtimes and data stores without even having all of them installed locally.

Every project has friction between members, disagreements, conflicts over style and philosophy. These social problems are counter-acted by the fact that no large project can be accomplished otherwise. "We must all hang together, or we will all hang separately." But the expressiveness of Lisp makes this countervailing force much weaker; one can always start one's own project... This is the Lisp Curse.

Basically, Python can be seen as a dialect of Lisp with "traditional" syntax (what Lisp people call "infix" or "m-lisp" syntax). Python supports all of Lisp's essential features except macros