Execute a python script on button click

You can use Ajax, which is easier with jQuery

$.ajax({
   url: "/path/to/your/script",
   success: function(response) {
     // here you do whatever you want with the response variable
   }
});

and you should read the jQuery.ajax page since it has too many options.

Make a page(or a service) in python, which can accept post or get request and process the info and return back a response. It is better if the response is in json format. Then you can use this code to make a call on the button click.

<input type="text" name="name" id="name">
<button type="button" id="home" onclick="validate()" value="checkvalue">
<script>
$('#id').click(function(){

 $.ajax({
      type:'get',
      url:<YOUR SERVERSIDE PAGE URL>,
      cache:false,
      data:<if any arguments>,
      async:asynchronous,
      dataType:json, //if you want json
      success: function(data) {
        <put your custom validation here using the response from data structure >
      },
      error: function(request, status, error) {
        <put your custom code here to handle the call failure>
      }
   });
});
</script>

I hope this helps