From 3362a98a705c7b488bf80ba1a132abc553fc53b3 Mon Sep 17 00:00:00 2001
From: Peter Heatwole <pfheatwole@gmail.com>
Date: Sat, 30 Jan 2021 10:23:48 -0800
Subject: [PATCH] Add example to README

Explain how the plugin can be used to find unused installations.
---
 README.rst | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/README.rst b/README.rst
index f72094b..6dea09e 100644
--- a/README.rst
+++ b/README.rst
@@ -62,6 +62,28 @@ For example, to get a list of all versions linked to a virtual environment:
    3.8.6
    pypy3.6-7.3.1
 
+The list of linked versions can be combined with the list of all installed
+versions to show which installations are not linked to any environment in the
+specified directory:
+
+.. code-block:: bash
+
+   $ pyenv versions
+   * system (set by /home/peter/.local/pyenv/version)
+     3.6.10
+     3.7.5
+     3.7.9
+     3.8.6
+     3.9.1
+     pypy3.6-7.3.0
+     pypy3.6-7.3.1
+
+   $ comm -3 <(pyenv users --raw ~ | cut -d: -f1 | uniq) <(pyenv versions | tail -n+2 | tr -d "[:blank:]") | tr -d "[:blank:]"
+   3.6.10
+   3.7.5
+   3.9.1
+   pypy3.6-7.3.0
+
 
 Disclaimer
 ----------