add example for data handlers to docs too

5 jobs for lukas_issue153_feat_advanced-docu in 5 minutes and 51 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #210060
zam347 machinelearningtools
coverage

00:04:19

passed #210059
zam347 machinelearningtools
tests

00:03:41

 
  Docs
passed #210061
zam347 machinelearningtools
sphinx docs

00:01:07

 
  Pages
passed #210062
base zam347
pages

00:00:23

 
  Deploy
passed pages:deploy

00:00:04