18th October 2018: PostgreSQL 11 Released!
Supported Versions: Current (11) / 10 / 9.6 / 9.5 / 9.4 / 9.3
Development Versions: devel
Unsupported versions: 9.2 / 9.1 / 9.0

42.5. Anonymous Code Blocks

PL/Python also supports anonymous code blocks called with the DO statement:

DO $$
    # PL/Python code
$$ LANGUAGE plpythonu;

An anonymous code block receives no arguments, and whatever value it might return is discarded. Otherwise it behaves just like a function.