def update(self, friendly_name=values.unset, api_version=values.unset,<EOL>sms_url=values.unset, sms_method=values.unset,<EOL>sms_fallback_url=values.unset, sms_fallback_method=values.unset):
return self._proxy.update(<EOL>friendly_name=friendly_name,<EOL>api_version=api_version,<EOL>sms_url=sms_url,<EOL>sms_method=sms_method,<EOL>sms_fallback_url=sms_fallback_url,<EOL>sms_fallback_method=sms_fallback_method,<EOL>)<EOL>
Update the ShortCodeInstance

:param unicode friendly_name: A string to describe this resource
:param unicode api_version: The API version to use to start a new TwiML session
:param unicode sms_url: URL Twilio will request when receiving an SMS
:param unicode sms_method: HTTP method to use when requesting the sms url
:param unicode sms_fallback_url: URL Twilio will request if an error occurs in executing TwiML
:param unicode sms_fallback_method: HTTP method Twilio will use with sms_fallback_url

:returns: Updated ShortCodeInstance
:rtype: twilio.rest.api.v2010.account.short_code.ShortCodeInstance