Jinja: no test named 'None'

[jakirkham]

Running into an issue where using a template like this {{"" if np is None else np}}, I get the following exception jinja2.exceptions.TemplateAssertionError: no test named 'None'. Trying with is not has similar problems.

[ThiefMaster]

Use lowercase none.

Jinja's is is different from Python's is. It invokes functions registered as "tests". And while there's a none test, there's no test named None.

---

Useful side-note: Jinja also uses lowercase for true and false, even though the python-cased True and False work too.

[jakirkham]

Thanks @ThiefMaster. I'm still pretty new to jinja, but it seems pretty cool. Thanks for the pointers too.