完成个人中心—导航标签

1. 个人中心—视图函数带标签页面参数tag
   @app.route('/usercenter/<user_id>/<tag>')
   def usercenter(user_id, tag):
      if tag == ‘1':
          return render_template('usercenter1.html', **context)
   
   
2. 个人中心—导航标签链接增加tag参数
   <li role=“presentation”><a href=“{{ url_for(‘usercenter’,user_id = user.id,tag = ‘1’) }}">全部问答</a></li>
   
   
3. 个人中心—有链接到个人中心页面的url增加tag参数
    <a href="{{ url_for('usercenter',user_id = session.get('userid'), tag=1) }}">{{ session.get('user') }}</a>
4.  
7. 

9. 1. @app.route('/self/<user_id>/<tag>')
      @loginFirst
      def self(user_id, tag):
          user = User.query.filter(User.id==user_id).first()
          context = {
              'user': user
          }
          if tag  == '1':
              return render_template('allanswer.html',**context)
          elif tag == '2':
              return render_template('Allquestion.html',**context)
          else:
              return render_template('allimformation.html',**context)

      <ul class="nav_ul">
                 <li role="presentation"><a href="{{ url_for('self',user_id = user.id,tag='1') }}">全部问答</a> </li>
                  <li role="presentation"><a href="{{ url_for('self',user_id = user.id,tag='2') }}">全部评论</a> </li>
                  <li role="presentation"><a href="{{ url_for('self',user_id = user.id,tag='3') }}">个人信息</a> </li>
              {% block user %}