Start pydoc for the current statement you are on if you hit <F2>
.
Get https://github.com/tpope/vim-pathogen/ and install pythonDoc:
$ cd ~/.vim/bundle
~/.vim/bundle$ git clone https://github.com/tehmaze/vim-pythonDoc \
pythonDoc
Enjoy!
Switch to horizontal split:
let g:python_doc_split = "split"
Alternate path to pydoc:
let g:python_doc_command = "/path/to/pydoc"