xxxxxxxxxx
#key point: use .simple_tag to register filter in order to take any
#number of arguments
from django import template
register = template.Library()
@register.simple_tag
def my_tag(a, b):
print(a, b)
return 'What you need'
#In your template use this, again it should be '{%' instead of echo '{{'
{% my_tag 123 "abcd" %}