I am using jinja2, and I want to call a python function as a helper, using a similar syntax as if I were calling a macro. jinja2 seems intent on preventing me from making a function call, and insists I repeat myself by copying the function into a template as a macro.
Is there any straightforward way to do this? And, is there any way to import a whole set of python functions and have them accessible from jinja2, without going through a whole lot of rigamarole (such as writing an extension)?
Answer
For those using Flask, put this in your __init__.py:
def clever_function():
return u'HELLO'
app.jinja_env.globals.update(clever_function=clever_function)
and in your template call it with {{ clever_function() }}