parsley.js is not working in my django form validation : This code in django does not show any validation error.Am i missing any syntax or tag ?

`       <head>
	    	<link rel="stylesheet" type="text/css" href="/static/css/side_file.css">
	    	<script type="text/javascript" src="/static/js/parsley.js">
     </script>
    		<link rel="stylesheet" type="text/css" href="/static/css/side_file.css">
    		<script type="text/javascript" src="/static/js/parsley.js">
     </script>
    </head>`


`       <body>
         <form data-parsley-validate method="POST">
           {{form}}
         </form>
       </body>`