套件： python3-jinja2 (2.10-1ubuntu0.18.04.1)

small but fast and easy to use stand-alone template engine

Jinja2 is a template engine written in pure Python. It provides a Django inspired non-XML syntax but supports inline expressions and an optional sandboxed environment.

The key-features are:

 * Configurable syntax. If you are generating LaTeX or other formats with
   Jinja2 you can change the delimiters to something that integrates better
   into the LaTeX markup.
 * Fast. While performance is not the primarily target of Jinja2 it’s
   surprisingly fast. The overhead compared to regular Python code was reduced
   to the very minimum.
 * Easy to debug. Jinja2 integrates directly into the Python traceback system
   which allows you to debug Jinja2 templates with regular Python debugging
   helpers.
 * Secure. It’s possible to evaluate untrusted template code if the optional
   sandbox is enabled. This allows Jinja2 to be used as templating language
   for applications where users may modify the template design.