Full-text search against string (databaseless)

Question

Is there a way to perform a search in a document which I don't want to be stored anywhere? I've got some experience with Sphinx search and ElasticSearch and it seems they both operate on a database of some kind. I want to search a word in a single piece of text, in a string variable.

Answer 1

I ended up using nltk and pymorphy just tokenizing my text and comparing stems/normalized morphological forms from pymorphy with search items. No need for any heavy full-text search weaponry.