paragrep is a "paragraph grep" utility. It searches for a series of regular expressions in a text file (or several text files) and prints out the paragraphs containing those expressions. Normally paragrep displays a paragraph if it contains any of the expressions; this behavior can be modified by using the -a option.

$ pip install paragrep
$ paragrep --help

WARNING: As of version 3.2.0, paragrep no longer supports Python 2. If you need to run it under Python 2, use an older version. e.g.:

$ pip install paragrep==3.1.3

For all the docs, see the project site.