pip install jinja2

#coding:utf-8import tornado.webfrom jinja2 import Environment, FileSystemLoader, TemplateNotFoundclass TemplateRendring(object):  """  A simple class to hold methods for rendering templates.  """  def render_template(self, template_name, **kwargs):    template_dirs = []    if self.settings.get('template_path', ''):      template_dirs.append(self.settings['template_path'])    env = Environment(loader=FileSystemLoader(template_dirs))    try:      template = env.get_template(template_name)    except TemplateNotFound:      raise TemplateNotFound(template_name)    content = template.render(kwargs)    return content # 就是重新寫 BaseHandler 由jinja2模板渲染class BaseHandler(tornado.web.RequestHandler, TemplateRendering):  """  Tornado RequestHandler subclass.  """  def initialize(self):    pass  def get_current_user(self):    user = self.get_secure_cookie('user')    return user if user else None  def render_html(self, template_name, **kwargs):    kwargs.update({      'settings': self.settings,      'STATIC_URL': self.settings.get('static_url_prefix', '/static/'),      'request': self.request,      'current_user': self.current_user,      'xsrf_token': self.xsrf_token,      'xsrf_form_html': self.xsrf_form_html,    })    content = self.render_template(template_name, **kwargs)    self.write(content)