Configuring rewrite in Caddy web server does not work

I am trying to configure a rewrite rule in Caddy web server:

From: /data/id/name.html

To: /data.py?id=id&name=name

I have tried different approaches:

 rewrite /data/([^/]+)/([^/]+)\.html /data.py?id={1}&name={2}

This does not work and returns the homepage

  rewrite /data/(\d+)/([A-Za-z0-9_-]+)\.html /data.py?id={1}&name={2}

This also brings me to the homepage

  rewrite ^/data/(\w+)/(\w+)\.html$ /data.py?id={1}&name={2}

This fails and Caddy won't start due to an error

    rewrite /data {           r ^/(\w+)/(\w+)\.html$           to /data.py?id=$1&name=$2    }

Also fails when Caddy won't start.How do I configure it correctly?And why creating rewrite rules always fails to me; I know I am not smart :-) but I think it shouldn't be that difficult.