Looking for very light weight template library (not framework)

[Malcolm Greene]

New to Python and looking for a template library that allows Python
expressions embedded in strings to be evaluated in place. In other words
something more powerful than the basic "%(variable)s" or "$variable"
(Template) capabilities.

I know that some of the web frameworks support this type of template
capability but I don't need a web framework, just a library that
supports embedded expression evaluation.

Use case:

myOutput = """\

The total cost is {{invoice.total}}.

This order will be shipped to {{invoice.contact}} at the following
address:

{{invoice.address}}

This order was generated at {{some date/time expression}}
"""

Any suggestions appreciated.

Malcolm