I’ve searched the wiki modules page, but I can’t find anything similar to virtualenv (python) or rvm.
I read on another Stack Overflow question that Python was just like Ruby, as it relates to “everything’s an object,” and everything in Python was an object, just like Ruby.
sed. It has a fixed, relatively simple scope of work defined by the idea of reading and examining each line of a file. sed is not designed to be particularly readable. It is designed to be very small and very efficient on very tiny unix servers.