How to use the gprof2dot.Parser.__init__ function in gprof2dot

def __init__(self, filename):
        Parser.__init__(self)

        from zipfile import ZipFile

        self.database = ZipFile(filename)

        self.symbols = {}
        self.calls = {}

        self.profile = Profile()

def __init__(self, stream):
        Parser.__init__(self)
        self.stream = stream
        self.profile = Profile()
        self.profile[SAMPLES] = 0
        self.column = {}

def __init__(self, stream):
        Parser.__init__(self)
        self._stream = stream
        self.__line = None
        self.__eof = False
        self.line_no = 0