jinja2.py 文件源码

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

        self.context_processors = options.pop('context_processors', [])

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

        if 'loader' not in options:
            options['loader'] = jinja2.FileSystemLoader(self.template_dirs)
        options.setdefault('autoescape', True)
        options.setdefault('auto_reload', settings.DEBUG)
        options.setdefault('undefined',
                           jinja2.DebugUndefined if settings.DEBUG else jinja2.Undefined)

        self.env = environment_cls(**options)