Message not supported for all requests in python

[nilamo]

Yes In browser its working fine and I'm getting the response as 200.

That means you can do it, too, but the way you're trying to do it isn't the same as whatever the browser is doing. So open the inspector (for the good browsers, that's F12 or ctrl+j), and watch the network tab when you do it. Once you see the url, http method, and payload, try to recreate it in an external program such as fiddler. Once you have it working THERE, it should be simple for you to recreate it using requests.