python 利用jinja2模板生成html代码实例

from jinja2 import Environment, FileSystemLoader
import json
 
 
def generate_html(data):
   env = Environment(loader = FileSystemLoader( './' ))  # 加载模板
   template = env.get_template( '模板.html' )
   # template.stream(body).dump('result.html', 'utf-8')
 
   with open ( "result.html" , 'w' ) as fout:
 
     html_content = template.render(data = {})
     fout.write(html_content)  # 写入模板 生成html
 
if __name__ = = "__main__" :
   result = {}
   generate_html(result)

#### 脚本执行 添加进度信息ff = open('1.txt','w')
 
 
def open_file(file_name):
   try :
     with open (file_name, 'a+' )as f: # 例如打开一个大文件
       fsize = os.path.getsize(file_name)  # 先计算大文件大小
       line_list_size = 0
 
       for line_list in f: 
         line_list_size + = sys.getsizeof(line_list) # 计算处理文件大小
         done = int ( float (line_list_size) / fsize * 10 )  # 计算进度
         sys.stdout.write( "\r[%s%s] %d%%" % ( '█' * done * 2 , ' ' * ( 20 - done * 2 ), 10 * done))
         sys.stdout.flush() # 刷新到控制台
         
   except Exception, e:
     print e
     return '文件操作失败'
if __name__ = = "__main__" :
   file_name = '235'
   print '---- start ----'
   open_file(file_name)
   print '\n---- end ----'
 
 
 
TEMPLATE_ENVIRONMENT = Environment(loader=FileSystemLoader(os.path.join(PATH, 'templates')), autoescape=False, trim_blocks=False)


def render_template(template_filename, context):
    return TEMPLATE_ENVIRONMENT.get_template(template_filename).render(context)
 

with open(target, 'w') as f:
    html = render_template(tpl, context)
    f.write(html)