<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_my_hostname(self, split_hostname_on_first_period=False):
 """ Returns a best guess for the hostname registered with OpenStack for this host """


        hostname = self.init_config.get("os_host") or self.hostname
        if split_hostname_on_first_period:
            hostname = hostname.split('.')[0]

        return hostname