파이썬으로 크롤링이 안되는 부분도있나요?

for num in bsobj.findAll("span",{"class":"page_num"}):
    print(num)

<div id="pageObjNavagtion" style="display:block;">
 <div class = "paging">
  <a href = "javascript:pageObj.sendPage('27001');" class="prev">..</a>
    <span class="page_num">
      <strong>....</strong>
       <a href = "javascript"pageObj.sendPage('27551'):">552</a>
       <a href = "javascript"pageObj.sendPage('27601'):">553</a>
       <a href = "javascript"pageObj.sendPage('27651'):">554</a>
       <a href = "javascript"pageObj.sendPage('27701'):">555</a>
.....
     </span>
   <a href = "javascript:pageObj.sendPage('28001');" class="next">..</a>    

1 for num in bsobj.findAll("span",{"class":"page_num"}):
    print(num)
2 for num in bsobj.findAll("div",{"id":"pageObjNavgation"}):
    print(num) 
   ->이때의 output은 <div id="pageObjNavgation" style="display: none;"></div> 만 나옵니다
3 for num in bsobj.findAll("span",{"class":"page_num"}):
    print(num)
4.정규표현식