xhtml2pdf python make 3 columns in one row

Question

I am using xhtml2pdf, I want to make 3 columns in a row with the same width when generating pdf. But in the pdf I have

Code :

                    
         
消灭零回复
 
                 
        
        

          

            
            

              
              

            
    


                                 
              
            
                          
    

        
         

                验证码
                

                  
                
                

                   看不清?
                
              
                                  

                    
   
                 
             
              
提交回复