def __init__(self, key=None, value=None, p=None):
self._key = None<EOL>self._value = None<EOL>self._personalization = None<EOL>if key is not None:<EOL><INDENT>self.key = key<EOL><DEDENT>if value is not None:<EOL><INDENT>self.value = value<EOL><DEDENT>if p is not None:<EOL><INDENT>self.personalization = p<EOL><DEDENT>
Create a Header.

        :param key: The name of the header (e.g. "Date")
        :type key: string, optional
        :param value: The header's value (e.g. "2013-02-27 1:23:45 PM PDT")
        :type value: string, optional
        :param name: p is the Personalization object or Personalization object
                     index
        :type name: Personalization, integer, optional