Smart completion after "from foo": add "import" and complete

This adds a new setting `jedi#smart_auto_mappings` (default 1).

autoload/jedi.vim

@@ -32,7 +32,8 @@ let s:default_settings = {
     \ 'popup_select_first': 1,
     \ 'quickfix_window_height': 10,
     \ 'completions_enabled': 1,
-    \ 'force_py_version': "'auto'"
+    \ 'force_py_version': "'auto'",
+    \ 'smart_auto_mappings': 1
 \ }
 
 for [key, val] in items(s:deprecations)
@@ -422,6 +423,16 @@ function! jedi#complete_opened(is_popup_on_dot)
 endfunction
 
 
+function! jedi#smart_auto_mappings(is_popup_on_dot)
+    " Auto put import statement after from module.name<space> and complete
+    if search('\<from\s\+[A-Za-z0-9._]\+\s*\%#\s*$', 'bcn', line('.'))
+        " Enter character and start completion.
+        return "\<space>import \<C-x>\<C-o>\<C-r>=jedi#complete_opened(".a:is_popup_on_dot.")\<CR>"
+    endif
+    return "\<space>"
+endfunction
+
+
 "PythonJedi jedi_vim.jedi.set_debug_function(jedi_vim.print_to_stdout, speed=True, warnings=False, notices=False)
 "PythonJedi jedi_vim.jedi.set_debug_function(jedi_vim.print_to_stdout)
 

doc/jedi-vim.txt

@@ -41,6 +41,7 @@ Contents				*jedi-vim-contents*
     6.9. completions_enabled		|g:jedi#completions_enabled|
     6.10. use_splits_not_buffers	|g:jedi#use_splits_not_buffers|
     6.11. force_py_version              |g:jedi#force_py_version|
+    6.12. smart_auto_mappings           |g:jedi#smart_auto_mappings|
 7. Testing				|jedi-vim-testing|
 8. Contributing				|jedi-vim-contributing|
 9. License				|jedi-vim-license|
@@ -481,6 +482,18 @@ Function: `jedi#force_py_version(py_version)`
 
 Options: 2 or 3
 Default: "auto" (will use sys.version_info from "python" in your $PATH)
+------------------------------------------------------------------------------
+6.12. `g:jedi#smart_auto_mappings`	            *g:jedi#smart_auto_mappings*
+
+When you start typing `from module.name<space>` jedi-vim automatically
+adds the "import" statement and displays the autocomplete popup.
+
+This option can be disabled in the .vimrc:
+
+`let g:jedi#smart_auto_mappings = 0`
+
+Options: 0 or 1
+Default: 1 (enabled by default)
 
 ==============================================================================
 7. Testing				*jedi-vim-testing*

ftplugin/python/jedi.vim

@@ -37,6 +37,10 @@ if g:jedi#auto_initialization
         inoremap <silent> <buffer> . .<C-R>=jedi#complete_string(1)<CR>
     endif
 
+    if g:jedi#smart_auto_mappings == 1
+        inoremap <buffer> <expr> <Space> jedi#smart_auto_mappings(g:jedi#popup_on_dot)
+    end
+
     if g:jedi#auto_close_doc
         " close preview if its still open after insert
         autocmd InsertLeave <buffer> if pumvisible() == 0|pclose|endif