Vim setting for python

[OS]: Ubuntu

[Path]: ~/.vimrc (create one if don't have)

here is how to config vim for python:

filetype plugin indent on
syntax on
au BufNewFile,BufRead *.py set ts=4 softtabstop=4 shiftwidth=4 expandtab=4 smarttab autoindent 

and why you can't use source ~/.vimrc in your terminal after you finished configuration.