Interchange variable between python and vim

scratch.vim

"===========================================
" help Python
"===========================================
" vim.eval(str)						*python-eval*
" 	Evaluates the expression str using the vim internal expression
" 	evaluator (see |expression|).  Returns the expression result as:
" 	- a string if the Vim expression evaluates to a string or number
" 	- a list if the Vim expression evaluates to a Vim list
" 	- a dictionary if the Vim expression evaluates to a Vim dictionary
" 	Dictionaries and lists are recursively expanded.
"
" vim.eval(str)						*python-eval*
"		vim内の式評価を使って、式を評価します(|expression|を参照)。戻り値は、
"		次の通り:
"		- Vimの式を評価した結果が文字列か数値ならば文字列
"		- Vimの式を評価した結果がリストならばリスト
"		- Vimの式を評価した結果がVimの辞書ならば辞書
"		辞書とリストは再帰的に展開されます。
"

python << EOS
def vim2py(name):
  """Get Vim's variable from Python's world"""
  return vim.eval(name)

def py2vim(name):
  """Export Python's variable to Vim world"""
  cmd = "let %s = %s" % (name , repr(eval(name)))
  vim.command(cmd)

def export_var_to_vim(*var_names):
  for var_name in var_names: py2vim(var_name)

def import_var_from_vim(*var_names):
  """Import Vim's variable to Python world"""
  result = {}
  for var_name in var_names: result[var_name] = vim2py(var_name)
  return result
EOS

echo "----------------------------------------"
echo "* Import Vim's variable to Python world"
echo "----------------------------------------"
let g:vim_num  = 1
let g:vim_str  = "This is String"
let g:vim_list = [1, 2, 3, 4, 5, 6]
let g:vim_dict = {
            \ 'port'  : 80,
            \ 'bind'  : "localhost",
            \ 'https' : 'none',
            \ }

python <<EOS
import_var = [ "g:vim_num", "g:vim_str", "g:vim_list", "g:vim_dict" ]
vim_var = import_var_from_vim(*import_var)
EOS

echo "[Number]"
python print vim_var['g:vim_num']
echo ""
echo "[String]"
python print vim_var['g:vim_str']
echo ""
echo "[List]"
python print vim_var['g:vim_list']
echo ""
echo "[Dict]"
python print vim_var['g:vim_dict']
echo ""

echo "----------------------------------------"
echo "*Export Python's variable to Vim world"
echo "----------------------------------------"
python <<EOS
py_num  = 1
py_str  = "This is String"
py_list = [1, 2, 3, 4, 5, 6]
py_dict = {
    'port'  : 80,
    'bind'  : "localhost",
    'https' : 'none',
    }

export_var = ["py_num", "py_str", "py_list", "py_dict"]
export_var_to_vim(*export_var)
EOS

echo "[Number]"
echo py_num
echo ""
echo "[String]"
echo py_str
echo ""
echo "[List]"
echo py_list
echo ""
echo "[Dict]"
echo py_dict
echo ""

"========================================
" Result
"========================================
"----------------------------------------
"* Import Vim's variable to Python world
"----------------------------------------
"[Number]
"1
"
"[String]
"This is String
"
"[List]
"['1', '2', '3', '4', '5', '6']
"
"[Dict]
"{'bind': 'localhost', 'port': '80', 'https': 'none'}
"
"----------------------------------------
"*Export Python's variable to Vim world
"----------------------------------------
"[Number]
"1
"
"[String]
"This is String
"
"[List]
"[1, 2, 3, 4, 5, 6]
"
"[Dict]
"{'https': 'none', 'bind': 'localhost', 'port': 80}
"