NativeTemplate in Jinja2-2.10.3 in Python 3.6

$ pyenv shell 3.6.8
$ pip install jinja2
Collecting jinja2
  Using cached https://files.pythonhosted.org/packages/65/e0/eb35e762802015cab1ccee04e8a277b03f1d8e53da3ec3106882ec42558b/Jinja2-2.10.3-py2.py3-none-any.whl
Collecting MarkupSafe>=0.23 (from jinja2)
  Downloading https://files.pythonhosted.org/packages/f0/00/a6aea33f5598b080b86d6b6d1214b51afe3ffa6100b902d5aa465080083f/MarkupSafe-1.1.1-cp36-cp36m-macosx_10_6_intel.whl
Installing collected packages: MarkupSafe, jinja2
Successfully installed MarkupSafe-1.1.1 jinja2-2.10.3
You are using pip version 18.1, however version 19.3.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
 pprescod  /  tmp  python
Python 3.6.8 (default, Feb 19 2019, 17:13:58) 
[GCC 4.2.1 Compatible Apple LLVM 10.0.0 (clang-1000.10.44.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from jinja2.nativetypes import NativeTemplate
>>> print(NativeTemplate("{{date}}").render(date="2012-11-12"))
1989