def __init__(self):
self._tos = []<EOL>self._ccs = []<EOL>self._bccs = []<EOL>self._subject = None<EOL>self._headers = []<EOL>self._substitutions = []<EOL>self._custom_args = []<EOL>self._send_at = None<EOL>self._dynamic_template_data = None<EOL>
Create an empty Personalization and initialize member variables.