def register_template_library(package_name):












  if not django.template.libraries.get(package_name, None):
    django.template.add_to_builtins(package_name)
Registers a template extension module to make it usable in templates.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/webapp/template.py/register_template_library