Django snippets

from django import template

register = template.Library()

@register.filter
def truncatewords_by_chars(value, arg):
  """
  Truncate words based on the number of characters
  based on original truncatewords filter code
  
  Receives a parameter separated by spaces where each field means:
   - limit: number of characters after which the string is truncated
   - lower bound: if char number is higher than limit, truncate by lower bound
   - higher bound: if char number is less than limit, truncate by higher bound
  """
  from django.utils.text import truncate_words
  try:
    args = arg.split(' ')
    limit = int(args[0])
    lower = int(args[1])
    higher = int(args[2])
  except ValueError: # Invalid literal for int().
    return value
  if len(value) >= limit:
    return truncate_words(value, lower)
  if len(value) < limit:
    return truncate_words(value, higher)