python crawler - python how to pass parameters in checkbox using post

Question

The URL is http://wwwold.ipe.org.cn/poll..., I only want the water type in the violation type, but the webpage code in this checkbox<td><input id= "s_ItemType_0" type="checkbox" name="s_ItemType$0" checked="checked" /> Only name, no value. How should I pass parameters using post? I tried on, but the data crawled out is still checked. value

Answer 1

Answer 2

Thank you, I forgot to add 'isgaoji':'1', thank you very much