Get list form post in Tornado

get_list_from_post_in_tornado.py

class FormHandler(tornado.web.RequestHandler):
    def get(self, *args, **kwargs):
        return self.render("forms.html")
 
    def post(self, *args, **kwargs):
        orders = self.get_body_arguments("order", None)
 
        print("orders", orders)
        print("type(orders)", type(orders))
 
        if isinstance(orders, list):
            orders.append("999999")
 
        self.write(str(orders))
        

get_list_from_post_in_tornado_html.html

       
<form action="">
<input type="input" name="order" value=2 />
<input type="input" name="order" value=4 />
<input type="input" name="order" value=1 />
<input type="input" name="order" value=3 />
</form>