with notify script

README.md

@@ -869,6 +869,26 @@ Add:
 There is no need to run `source`, activate the virtual environment, or use a
 wrapper script.
 
+## Sending an ntfy notification
+
+`ntfy_notify.py` provides both a command-line interface and a reusable Python
+function. Send a message from the command line with:
+
+```bash
+/opt/ups/.venv/bin/python /opt/ups/ntfy_notify.py "Some text"
+```
+
+Use it as a Python library with:
+
+```python
+from ntfy_notify import send_notification
+
+send_notification("Some text")
+```
+
+The default topic can be overridden with `--topic-url` or the
+`NTFY_TOPIC_URL` environment variable.
+
 After a few minutes:
 
 ```bash