## What changes were proposed in this pull request?

Add backslash for line continuation in python code.

## How was this patch tested?

Jenkins.

Author: uncleGen <hustyugm@gmail.com>
Author: dylon <hustyugm@gmail.com>

Closes #17352 from uncleGen/python-example-doc.

(cherry picked from commit facfd608)
Signed-off-by: Sean Owen <sowen@cloudera.com>