Vim as Python IDE, source https://realpython.com/vim-and-python-a-match-made-in-heaven/#verifying-your-vim-install

.vimrc

set nocompatible              " required
filetype off                  " required

" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()

" alternatively, pass a path where Vundle should install plugins
"call vundle#begin('~/some/path/here')

" let Vundle manage Vundle, required
Plugin 'gmarik/Vundle.vim'
Plugin 'tmhedberg/SimpylFold'
Plugin 'vim-scripts/indentpython.vim'
Bundle 'Valloric/YouCompleteMe'
Plugin 'vim-syntastic/syntastic'
Plugin 'nvie/vim-flake8'
Plugin 'jnurmine/Zenburn'
Plugin 'altercation/vim-colors-solarized'
Plugin 'scrooloose/nerdtree'
Plugin 'Lokaltog/powerline', {'rtp': 'powerline/bindings/vim/'}

" add all your plugins here (note older versions of Vundle
" used Bundle instead of Plugin)

" ...

" All of your Plugins must be added before the following line
call vundle#end()            " required
filetype plugin indent on    " required


"split navigations
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>
" Enable folding with the spacebar
nnoremap <space> za

" Enable folding
set foldmethod=indent
set foldlevel=99

"Pep 8 for python
au BufNewFile,BufRead *.py
    \ set tabstop=4 |
    \ set softtabstop=4 |
    \ set shiftwidth=4 |
    \ set textwidth=79 |
    \ set expandtab |
    \ set autoindent |
    \ set fileformat=unix 
"Flagging Unnecessary Whitespace
highlight BadWhitespace ctermbg=red guibg=darkred
au BufRead,BufNewFile *.py,*.pyw,*.c,*.h match BadWhitespace /\s\+$/

"Flagging Unnecessary Whitespace
"au BufRead,BufNewFile *.py,*.pyw,*.c,*.h match BadWhitespace /\s\+$/

"utf-8 support
set encoding=utf-8

let g:ycm_autoclose_preview_window_after_completion=1
map <leader>g  :YcmCompleter GoToDefinitionElseDeclaration<CR>

"python with virtualenv support
py3 << EOF
import os
import sys
if 'VIRTUAL_ENV' in os.environ:
  project_base_dir = os.environ['VIRTUAL_ENV']
  activate_this = os.path.join(project_base_dir, 'bin/activate_this.py')
  exec(compile(open(activate_this, "rb").read(),activate_this,  "exec"), dict(__file__=activate_this))
EOF

"make your code look pretty:
let python_highlight_all=1
syntax on

if has('gui_running')
  set background=dark
  colorscheme solarized
else
  colorscheme zenburn
endif

call togglebg#map("<F5>")


set nu