diff --git a/.vim/coc-settings.json b/.vim/coc-settings.json
new file mode 100644
index 0000000000000000000000000000000000000000..ee03dc27a107dd164a5d6fc8442f6489082a271a
--- /dev/null
+++ b/.vim/coc-settings.json
@@ -0,0 +1,7 @@
+{
+  "python.linting.enabled": true,
+  "python.linting.flake8Enabled": true,
+  "python.linting.pydocstyleEnabled": true,
+  "python.linting.pylintEnabled": true,
+  "python.formatting.provider": "black"
+}
diff --git a/.vim/ftplugin/python.vim b/.vim/ftplugin/python.vim
index 5c9fd25962982b2b45ddb3853fec6eb374edc1d9..c0e3390c183a72445d1eae5ded4fb5082cf2c10d 100644
--- a/.vim/ftplugin/python.vim
+++ b/.vim/ftplugin/python.vim
@@ -7,6 +7,137 @@ setlocal foldmethod=indent
 setlocal formatoptions=croql
 setlocal textwidth=79 
 
+" Coc recomended settings ------------------ {{{
+" if hidden is not set, TextEdit might fail.
+set hidden
+
+" Some servers have issues with backup files, see #649
+set nobackup
+set nowritebackup
+
+" Better display for messages
+set cmdheight=2
+
+" You will have bad experience for diagnostic messages when it's default 4000.
+set updatetime=300
+
+" don't give |ins-completion-menu| messages.
+set shortmess+=c
+
+" always show signcolumns
+set signcolumn=yes
+
+" Use tab for trigger completion with characters ahead and navigate.
+" Use command ':verbose imap <tab>' to make sure tab is not mapped by other plugin.
+inoremap <silent><expr> <TAB>
+      \ pumvisible() ? "\<C-n>" :
+      \ <SID>check_back_space() ? "\<TAB>" :
+      \ coc#refresh()
+inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
+
+function! s:check_back_space() abort
+  let col = col('.') - 1
+  return !col || getline('.')[col - 1]  =~# '\s'
+endfunction
+
+" Use <c-space> to trigger completion.
+inoremap <silent><expr> <c-space> coc#refresh()
+
+" Use <cr> to confirm completion, `<C-g>u` means break undo chain at current position.
+" Coc only does snippet and additional edit on confirm.
+inoremap <expr> <cr> pumvisible() ? "\<C-y>" : "\<C-g>u\<CR>"
+" Or use `complete_info` if your vim support it, like:
+" inoremap <expr> <cr> complete_info()["selected"] != "-1" ? "\<C-y>" : "\<C-g>u\<CR>"
+
+" Use `[g` and `]g` to navigate diagnostics
+nmap <silent> [g <Plug>(coc-diagnostic-prev)
+nmap <silent> ]g <Plug>(coc-diagnostic-next)
+
+" Remap keys for gotos
+nmap <silent> gd <Plug>(coc-definition)
+nmap <silent> gy <Plug>(coc-type-definition)
+nmap <silent> gi <Plug>(coc-implementation)
+nmap <silent> gr <Plug>(coc-references)
+
+" Use K to show documentation in preview window
+nnoremap <silent> K :call <SID>show_documentation()<CR>
+
+function! s:show_documentation()
+  if (index(['vim','help'], &filetype) >= 0)
+    execute 'h '.expand('<cword>')
+  else
+    call CocAction('doHover')
+  endif
+endfunction
+
+" Highlight symbol under cursor on CursorHold
+autocmd CursorHold * silent call CocActionAsync('highlight')
+
+" Remap for rename current word
+nmap <leader>rn <Plug>(coc-rename)
+
+" Remap for format selected region
+xmap <leader>f  <Plug>(coc-format-selected)
+nmap <leader>f  <Plug>(coc-format-selected)
+
+augroup mygroup
+  autocmd!
+  " Setup formatexpr specified filetype(s).
+  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
+  " Update signature help on jump placeholder
+  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
+augroup end
+
+" Remap for do codeAction of selected region, ex: `<leader>aap` for current paragraph
+xmap <leader>a  <Plug>(coc-codeaction-selected)
+nmap <leader>a  <Plug>(coc-codeaction-selected)
+
+" Remap for do codeAction of current line
+nmap <leader>ac  <Plug>(coc-codeaction)
+" Fix autofix problem of current line
+nmap <leader>qf  <Plug>(coc-fix-current)
+
+" Create mappings for function text object, requires document symbols feature of languageserver.
+xmap if <Plug>(coc-funcobj-i)
+xmap af <Plug>(coc-funcobj-a)
+omap if <Plug>(coc-funcobj-i)
+omap af <Plug>(coc-funcobj-a)
+
+" Use <C-d> for select selections ranges, needs server support, like: coc-tsserver, coc-python
+nmap <silent> <C-d> <Plug>(coc-range-select)
+xmap <silent> <C-d> <Plug>(coc-range-select)
+
+" Use `:Format` to format current buffer
+command! -nargs=0 Format :call CocAction('format')
+
+" Use `:Fold` to fold current buffer
+command! -nargs=? Fold :call     CocAction('fold', <f-args>)
+
+" use `:OR` for organize import of current buffer
+command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')
+
+" Add status line support, for integration with other plugin, checkout `:h coc-status`
+set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}
+
+" Using CocList
+" Show all diagnostics
+nnoremap <silent> <space>a  :<C-u>CocList diagnostics<cr>
+" Manage extensions
+nnoremap <silent> <space>e  :<C-u>CocList extensions<cr>
+" Show commands
+nnoremap <silent> <space>c  :<C-u>CocList commands<cr>
+" Find symbol of current document
+nnoremap <silent> <space>o  :<C-u>CocList outline<cr>
+" Search workspace symbols
+nnoremap <silent> <space>s  :<C-u>CocList -I symbols<cr>
+" Do default action for next item.
+nnoremap <silent> <space>j  :<C-u>CocNext<CR>
+" Do default action for previous item.
+nnoremap <silent> <space>k  :<C-u>CocPrev<CR>
+" Resume latest coc list
+nnoremap <silent> <space>p  :<C-u>CocListResume<CR>
+" }}}
+
 let g:slime_target = "vimterminal"
 let g:slime_vimterminal_config = {"term_name":"REPL" , "vertical" : "1"}
 let g:slime_vimterminal_cmd = "ipython"
@@ -40,13 +171,13 @@ vnoremap <buffer> <localleader>cu :s/^#//<cr>
 " let g:ropevim_prefer_py3=1
 " let b:ropevim_prefer_py3=1
 
-if executable('pyls')
-    au User lsp_setup call lsp#register_server({
-        \ 'name': 'pyls',
-        \ 'cmd': {server_info->['pyls']},
-        \ 'whitelist': ['python'],
-        \ })
-endif
+" if executable('pyls')
+"     au User lsp_setup call lsp#register_server({
+"         \ 'name': 'pyls',
+"         \ 'cmd': {server_info->['pyls']},
+"         \ 'whitelist': ['python'],
+"         \ })
+" endif
 
 "     lsc   let g:lsc_server_commands = {
 "     lsc    \  'python': {
@@ -70,14 +201,14 @@ endif
 " set foldmethod=indent
 let python_highlight_all=1
 "
-" Check Python files with flake8 and pylint.
-let b:ale_linters = ['pyls', 'flake8', 'pylint', 'pycodestyle', 'pydocstyle', 'bandit', 'mypy', 'prospector', 'pyflakes', 'pylama', 'pyre', 'vulture']
-
-" Fix Python files black.
-let b:ale_fixers = ['black', 'isort', 'remove_trailing_lines', 'reorder-python-imports', 'trim_whitespace', 'add_blank_lines_for_python_control_statements']
-
-" Disable warnings about trailing whitespace for Python files.
-let b:ale_warn_about_trailing_whitespace = 0
+" " Check Python files with flake8 and pylint.
+" let b:ale_linters = ['pyls', 'flake8', 'pylint', 'pycodestyle', 'pydocstyle', 'bandit', 'mypy', 'prospector', 'pyflakes', 'pylama', 'pyre', 'vulture']
+" 
+" " Fix Python files black.
+" let b:ale_fixers = ['black', 'isort', 'remove_trailing_lines', 'reorder-python-imports', 'trim_whitespace', 'add_blank_lines_for_python_control_statements']
+" 
+" " Disable warnings about trailing whitespace for Python files.
+" let b:ale_warn_about_trailing_whitespace = 0
 
 " Use the below highlight group when displaying bad whitespace is desired.
 highlight BadWhitespace ctermbg=red guibg=red
diff --git a/.vimrc b/.vimrc
index 995488d9836822bdb6aae25109cb404bed5c4329..d4a66ceed9caec7e3afa5deed8b0d65bbe6a836a 100644
--- a/.vimrc
+++ b/.vimrc
@@ -3,9 +3,12 @@
 " Plugged Plugins -------------------------{{{
 call plug#begin('~/.vim/plugged')
 "
-Plug 'dense-analysis/ale'
-Plug 'prabirshrestha/async.vim'
-Plug 'prabirshrestha/vim-lsp'
+" Plug 'dense-analysis/ale'
+" Plug 'prabirshrestha/async.vim'
+" Plug 'prabirshrestha/vim-lsp'
+
+Plug 'neoclide/coc.nvim', {'branch': 'release'}
+
 
 Plug 'jpalardy/vim-slime'