Suppress “None” output as string in Jinja2

Question

How do I persuade Jinja2 to not print \"None\" when the value is None?

I have a number of entries in a dictionary and I would like to outpu

Answer 1

Another option is to use the finalize hook on the environment:

>>> import jinja2
>>> e = jinja2.Environment()
>>> e.from_string("{{ this }} / {{ that }}").render(this=0, that=None)
u'0 / None'

but:

>>> def my_finalize(thing):
...     return thing if thing is not None else ''
...
>>> e = jinja2.Environment(finalize=my_finalize)
>>> e.from_string("{{ this }} / {{ that }}").render(this=0, that=None)
u'0 / '