def send_keys(self, keys, wait=True):
self._process.stdin.write(bytearray(keys, self._encoding))<EOL>self._process.stdin.flush()<EOL>if wait:<EOL><INDENT>self.wait()<EOL><DEDENT>
Send a raw key sequence to *Vim*.

.. note:: *Vim* style key sequence notation (like ``<Esc>``)
          is not recognized.
          Use escaped characters (like ``'\033'``) instead.

Example:

>>> import headlessvim
>>> with headlessvim.open() as vim:
...     vim.send_keys('ispam\033')
...     str(vim.display_lines()[0].strip())
...
'spam'

:param strgin keys: key sequence to send
:param boolean wait: whether if wait a response