title: .asp The data is not retrieved
body: <p>I have a problem with my python that fetch HTML tag in the .asp file
  First, input the selection tag on the asp website and then change it to the next asp page.</p>
  <pre><code>http://www.indexpr.moc.go.th/PRICE_PRESENT/Select_month_regionCsi.asp?region=3
  </code></pre>
  <p>must input the month, year, and province.</p>
  <p><a href="https://i.stack.imgur.com/HgDPZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HgDPZ.png" alt="enter image description here" /></a></p>
  <p>After that shows the asp browser what I like to see, I want to scrap the HTML tag inside the browser. And I found the problem on this below.</p>
  <pre><code>post_request = requests.post('http://www.indexpr.moc.go.th/PRICE_PRESENT/table_month_regionCsi.asp', data=payload).content
  </code></pre>
  <p><code>soup = BeautifulSoup(post_request, 'html.parser')</code></p>
  <pre><code>payload = {
  
  'DDMonth': 4,
  'DDYear': 2565,
  'DDProvince': 50,
  'texttable': 'csi_price_north_web_avg',
  'text_name': 'unit_code_N',
  </code></pre>
  <p>}</p>
  <p>In tag tr, it is not retrieved the data.</p>
  <p>Here is the expect output</p>
  <p><a href="https://i.stack.imgur.com/SJcjD.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SJcjD.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/JKzDh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JKzDh.png" alt="enter image description here" /></a></p>
  <p>So what I get</p>
  <pre><code>&lt;tr bgcolor=&quot;#fefefe&quot;&gt; ...empty... &lt;/tr&gt;
  </code></pre>
  <p><a href="https://i.stack.imgur.com/tYKlQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tYKlQ.png" alt="enter image description here" /></a></p>