PL/Python is the procedural language for PostgreSQL that allows you to write database stored functions and triggers in Python. Python has proved to be a charming language and when used for where it excels, enhances the power of PostgreSQL quite nicely.
Unfortunately we can't quite capture all its charm in a single pager cheat sheet, but hopefully
this will give you a sense of its usefulness.
Below is a Thumbnail view of the PL\Python cheat sheet. This is by no means comprehensive, but are the features we thought may be useful to know.