Add the plugin files.

README.mdown

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+vim-flake8 ![Project status](http://stillmaintained.com/nvie/vim-flake8.png)
+==========
+
+Installation
+------------
+Use [vim-pathogen](https://github.com/tpope/vim-pathogen) if you're not using
+it already.  Then, simply put the contents of this repository in your
+`~/.vim/bundle` directory.
+
+Usage
+-----
+1. Open a Python file
+2. Press `<F7>` to run `flake8` on it
+
+It shows the errors inside a quickfix window, which will allow your to quickly
+jump to the error locations by simply pressing [Enter].
+
+
+Customization
+-------------
+If you don't want to use the `<F7>` key for flake8-checking, simply remap it to
+another key.  It autodetects whether it has been remapped and won't register
+the `<F7>` key if so.  For example, to remap it to `<F3>` instead, use:
+
+    autocmd FileType python map <buffer> <F3> :call Flake8()<CR>
+
+
+Tips
+----
+A tip might be to run the Flake8 check every time you write a Python file, to
+enable this, add the following line to your `.vimrc` file (thanks
+[Godefroid](http://github.com/gotcha)!):
+
+    autocmd BufWritePost *.py call Flake8()
+
+
+This plugin goes well together with the following plugin:
+
+- [PyUnit](http://github.com/nvie/vim-pyunit) (unit test helper under `<F8>`
+  and `<F9>`)

ftplugin/python_flake8.vim

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+"
+" Python filetype plugin for running flake8
+" Language:     Python (ft=python)
+" Maintainer:   Vincent Driessen <vincent@datafox.nl>
+" Version:      Vim 7 (may work with lower Vim versions, but not tested)
+" URL:          http://github.com/nvie/vim-flake8
+"
+" Only do this when not done yet for this buffer
+if exists("b:loaded_flake8_ftplugin")
+    finish
+endif
+let b:loaded_flake8_ftplugin=1
+
+let s:flake8_cmd="flake8"
+
+if !exists("*Flake8()")
+    function Flake8()
+        if !executable(s:flake8_cmd)
+            echoerr "File " . s:flake8_cmd . " not found. Please install it first."
+            return
+        endif
+
+        set lazyredraw   " delay redrawing
+        cclose           " close any existing cwindows
+
+        " store old grep settings (to restore later)
+        let l:old_gfm=&grepformat
+        let l:old_gp=&grepprg
+
+        " write any changes before continuing
+        if &readonly == 0
+            update
+        endif
+
+        " perform the grep itself
+        let &grepformat="%f:%l:%c: %m\,%f:%l: %m"
+        let &grepprg=s:flake8_cmd
+        silent! grep! %
+
+        " restore grep settings
+        let &grepformat=l:old_gfm
+        let &grepprg=l:old_gp
+
+        " open cwindow
+        let has_results=getqflist() != []
+        if has_results
+            execute 'belowright copen'
+            setlocal wrap
+            nnoremap <buffer> <silent> c :cclose<CR>
+            nnoremap <buffer> <silent> q :cclose<CR>
+        endif
+
+        set nolazyredraw
+        redraw!
+
+        if has_results == 0
+            " Show OK status
+            hi Green ctermfg=green
+            echohl Green
+            echon "Flake8 check OK"
+            echohl
+        endif
+    endfunction
+endif
+
+" Add mappings, unless the user didn't want this.
+" The default mapping is registered under to <F7> by default, unless the user
+" remapped it already (or a mapping exists already for <F7>)
+if !exists("no_plugin_maps") && !exists("no_flake8_maps")
+    if !hasmapto('Flake8(')
+        noremap <buffer> <F7> :call Flake8()<CR>
+        noremap! <buffer> <F7> :call Flake8()<CR>
+    endif
+endif