Pyjamas framework significance
GWT and Pyjamas were created to remove the drugery of coding Javascript and compensating for all of the different browser implementations and object models.

Yes, you still need a designer.  
Yes, you can code in python and not
have to learn Javascript (in theory).
No, you won't have to recode to work 
around "features" of the Javascript
implementations in new browsers or
old browsers.
I am learning Pyjamas framework of python to generate the frontend which is basically a javascript code generated by Pyjamas. Though, being a new concept and a GWT equivalent in python I am interested in learning it, but I can not really find out what is the actual significance of it? I mean we are coding in python, compiling the code and generating javascript, which allows us to put CSS classes with the code. So, basically it does not removes the need of a designer as well.
Also, is it a good idea to use Pyjamas with Django?
Please suggest.
Thanks in advance