text: #!/usr/bin/env python3
  # encoding: utf-8
  # @author: hoojo
  # @email:    hoojo_@126.com
  # @github:   https://github.com/hooj0
  # @create date: 2018-09-10
  # @copyright by hoojo @2018
  # @changelog process struct statement for loop
  
  
  # ===============================================================================
  # 标题：process struct statement for loop
  # ===============================================================================
  # 使用：for 循环流程语句，控制模板的结构流程
  # -------------------------------------------------------------------------------
  # 描述：使用循环做一些流程化的控制
  # -------------------------------------------------------------------------------
  
  
  # -------------------------------------------------------------------------------
  # 循环模板
  # -------------------------------------------------------------------------------
  from jinja2 import Environment, select_autoescape, FileSystemLoader
  
  # 从指定位置加载模板的环境
  loader = FileSystemLoader('.')
  # 更多配置参考：http://jinja.pocoo.org/docs/2.10/api/#high-level-api
  env = Environment(loader=loader,
                    autoescape=select_autoescape(['html', 'xml']),
                    line_statement_prefix="#",
                    line_comment_prefix="##",
                    trim_blocks=True, keep_trailing_newline=True, lstrip_blocks=True)
  
  # 获取模板
  template = env.get_template('for-template.html')
  
  user = [
      {"username": "jack"},
      {"username": "老张", "hidden": True},
      {"username": "tom 'kid <jim> ", "hidden": False}
  ]
  
  sitemap = [
      {"item": "foo", "href": "foo/a.htm"},
      {
          "item": "bar", "href": "bar/a.htm",
          "children": [{ "item": "bar-1", "href": "bar-1/a.htm"}]
      }
  ]
  
  # 渲染模板
  result = template.render(users = user,
                           my_dict = dict(name = 'tom', age = 22, address = 'china'),
                           my_dict2 = { 'name': 'jack', 'age': 22, 'brithday': (2010, 10, 22) },
                           rows = [ "a", "b", "c", "c" ],
                           sitemap = sitemap
                           )
  
  print(result)