def update(self, uid, **kwargs):
return self.update_instance(uid, kwargs)<EOL>
Updates the existing Contact for the given unique id.
Returns :class:`Contact` object contains id and link to Contact.

:Example:

client.contacts.update(uid=7981278, firstName="John", lastName="Doe", phone="19025555555", lists="1901901")

:param int uid:         The unique id of the Contact to update. Required.
:param str firstName:
:param str lastName:
:param str phone:       Contact's phone number. Required.
:param str email:
:param str companyName:
:param str lists:       String of Lists separated by commas to assign contact. Required.