compiler/python.vim

python.py

#!/usr/bin/env python
# put this file at ~/.vim/compiler.py

from __future__ import print_function
from sys import argv, exit


if len(argv) != 2:
    exit(1)

try:
    compile(open(argv[1]).read(), argv[1], 'exec', 0, 1)
except SyntaxError as err:
    print('%s:%s:%s: %s' % (err.filename, err.lineno, err.offset, err.msg))

python.vim

" Put this file at ~/.vim/compiler/python.vim
" Vim compiler file
" Compiler:         Python

if exists("current_compiler")
  finish
endif
let current_compiler = "python"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

let s:cpo_save = &cpo
set cpo-=C

let s:plugin_path = escape(expand('<sfile>:p:h'), '\')

CompilerSet errorformat=%E%f:%l:%c:\ %m
execute 'CompilerSet makeprg=python\ ' . s:plugin_path . '/python.py'

let &cpo = s:cpo_save
unlet s:cpo_save

Run :compiler python to set compiler to lint python. Run :make % to lint the current file.

python.py is taken directly from github:scrooloose/syntastic