# 46. PL/Python - Python Procedural Language The PL/Python procedural language allows PostgreSQL functions to be written in the [Python language](https://www.python.org/). To install PL/Python in a particular database, use `CREATE EXTENSION plpythonu` (but see also [Section 46.1](https://www.postgresql.org/docs/current/plpython-python23.html)). ## Tip If a language is installed into `template1`, all subsequently created databases will have the language installed automatically. PL/Python is only available as an “untrusted” language, meaning it does not offer any way of restricting what users can do in it and is therefore named `plpythonu`. A trusted variant `plpython` might become available in the future if a secure execution mechanism is developed in Python. The writer of a function in untrusted PL/Python must take care that the function cannot be used to do anything unwanted, since it will be able to do anything that could be done by a user logged in as the database administrator. Only superusers can create functions in untrusted languages such as `plpythonu`. ## Note Users of source packages must specially enable the build of PL/Python during the installation process. (Refer to the installation instructions for more information.) Users of binary packages might find PL/Python in a separate subpackage. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.postgresql.tw/12/server-programming/pl-python-python-procedural-language.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.