def translate(self, xt, yt, mode=None):
self._canvas.translate(xt, yt)<EOL>if mode:<EOL><INDENT>self._canvas.mode = mode<EOL><DEDENT>
Translate the current position by (xt, yt) and
optionally set the transform mode.

:param xt: Amount to move horizontally
:param yt: Amount to move vertically
:mode: Set the transform mode to CENTER or CORNER