title: how to install plpython for postgres?
body: <p>I have postgres image: <a href="https://hub.docker.com/_/postgres" rel="noreferrer">https://hub.docker.com/_/postgres</a>
  I am trying to create the python extension with the following command:</p>
  <pre><code>create extension plpythonu
  </code></pre>
  <p>but it fail with the error:</p>
  <pre><code>psql:/docker-entrypoint-initdb.d/init.sql:1: ERROR:  could not open extension control file &quot;/usr/share/postgresql/12/extension/plpythonu.control&quot;: No such file or directory
  
  </code></pre>
  <p>in my Dockerfile I try to install the package:</p>
  <pre><code>FROM postgres
  RUN apt-get update -y
  RUN apt install postgresql-plpython3-12
  
  </code></pre>
  <p>I get error:</p>
  <pre><code>
  Unable to locate package postgresql-plpython3-12
  
  </code></pre>
  <p>How can I extend the postgresql so that I can use python ?</p>