I just checked ipython notebook. Looks like Matlab Notebook, but in the browser instead of MS Word (I don't know if Matlab Notebook still exists, it's been a long time since the last time I used Windows), anyway, you should try org mode on emacs for python, is way more versatile, compiles to latex, html, and has almost all the features of the ipython notebook.... still Rstudio has a lot of graphical incentives, like data edition, environment variables, easy to follow documentation. Both org-mode and RStudio are very powerful tools, I was mostly ranting about how many options we have for making almost the same thing.