I am not sure how to accurately describe my problem , and right now i have a total mess in my head , so please deal with it and correct me if i am wrong , and i will be for sure.
MAIN GOAL:
Is to built a real time line chart  , which updates itself without web page reloading based on data , which comes from stdout .  So it basically must be python script  , which gets every second value , and based on this values continues to draw line in a line chart .
1) Well basic tags in my head right now are :  Javascript / AJAX , cgi , python http web server , SVG (Vector graphics).
So basically the biggest problem , which i dont understand is how to continuesly transfer stdout values to the webpage .  Should i write my own python http web server , somehow pass values and with javascript or ajax + SVG draw the chart .
Or writing a http web server is a stupid idea and i can somehow make it work without it ? 
Any other suggestions , or pointing me to some tutorials or arcticles are welcome . Because right now i am very confused  , especially on the part of continuesly passing values to webpage.
Thx in advance. Hope you will be able to point me somewhere =)
I would use JavaScript to create or manipulate an SVG document, with AJAX requests polling the server and getting data back.
Real time chart (SVG) + AJAX/Javascript/Jquery + StdOut + Python + I dont really know myself