# Django 1.8.18.dev20170123152445 documentation

# Source code for django.template.backends.jinja2

    # Since this package contains a "django" module, this is required on Python 2.
    from __future__ import absolute_import

    import sys

    import jinja2

    from django.conf import settings
    from django.template import TemplateDoesNotExist, TemplateSyntaxError
    from django.utils import six
    from django.utils.module_loading import import_string

    from .base import BaseEngine
    from .utils import csrf_input_lazy, csrf_token_lazy

    class Jinja2(BaseEngine):

        app_dirname = 'jinja2'

        def __init__(self, params):
            params = params.copy()
            options = params.pop('OPTIONS').copy()
            super(Jinja2, self).__init__(params)

            environment = options.pop('environment', 'jinja2.Environment')
            environment_cls = import_string(environment)

            options.setdefault('autoescape', True)
            options.setdefault('loader', jinja2.FileSystemLoader(self.template_dirs))
            options.setdefault('auto_reload', settings.DEBUG)
            options.setdefault('undefined',
                               jinja2.DebugUndefined if settings.DEBUG else jinja2.Undefined)

            self.env = environment_cls(**options)

        def from_string(self, template_code):
            return Template(self.env.from_string(template_code))

        def get_template(self, template_name):
            try:
                return Template(self.env.get_template(template_name))
            except jinja2.TemplateNotFound as exc:
                six.reraise(TemplateDoesNotExist, TemplateDoesNotExist(exc.args),
                            sys.exc_info()[2])
            except jinja2.TemplateSyntaxError as exc:
                six.reraise(TemplateSyntaxError, TemplateSyntaxError(exc.args),
                            sys.exc_info()[2])

    class Template(object):

        def __init__(self, template):
            self.template = template

        def render(self, context=None, request=None):
            if context is None:
                context = {}
            if request is not None:
                context['request'] = request
                context['csrf_input'] = csrf_input_lazy(request)
                context['csrf_token'] = csrf_token_lazy(request)
            return self.template.render(context)