'Initialize any data structures or variables needed for keeping track
of the tasty bits we find in the log we are parsing.'

def __init__(self, option_string=None):

    self.size_transferred = 0
    self.squid_codes = {'TCP_MISS': 0, 'TCP_DENIED': 0, 'TCP_HIT': 0, 'TCP_MEM_HIT': 0, 'OTHER': 0}
    self.http_1xx = 0
    self.http_2xx = 0
    self.http_3xx = 0
    self.http_4xx = 0
    self.http_5xx = 0
    self.reg = re.compile('^[0-9.]+    +(?P<size>[0-9]+)    .*(?P<squid_code>(TCP|UDP|NONE)_[A-Z_]+)/(?P<http_status_code>\\d{3})    .*')
