':param timev: a unix timestamp or None
:returns: a pretty string of the current time or provided time in UTC'

def _ptime(self, timev=None):

    if timev:
        return time.strftime('%Y-%m-%d    %H:%M:%S', time.gmtime(timev))
    else:
        return time.strftime('%Y-%m-%d    %H:%M:%S', time.gmtime())
