Add new line in Headers,python requests

So, i have to add a new line at end of my post header, but cant add it? Is there any way to do so,or should i use something other than requests. i have tried \n and \r\n as well but nothing seems to work. code >

headers ={'POST':"HTTP/1.1",<br>
        'Content-Length':"344",<br>
        'Host':"ccc.com",<br>
        'Authorization':"sometoken",<br>
        'api':x,<br>
        'customeheader':"custom value",<br>
        'Accept-Encoding':None,<br>
        'Accept':None,<br>
        'User-Agent':None,<br>
        'Connection':None,<br>

        }