How to use the gprof2dot.LineParser.readline function in gprof2dot

def readline(self):
        # Override LineParser.readline to ignore comment lines
        while True:
            LineParser.readline(self)
            if self.eof() or not self.lookahead().startswith('#'):
                break

def readline(self):
        # Override LineParser.readline to ignore comment lines
        while True:
            LineParser.readline(self)
            if self.eof():
                break

            line = self.lookahead().strip()
            if line.startswith('CPU'):
                # The format likes:
                # CPU     ID                    FUNCTION:NAME
                #   1  29684                        :tick-60s 
                # Skip next line
                LineParser.readline(self)
            elif not line == '':
                break

def readline(self):
        # Override LineParser.readline to ignore comment lines
        while True:
            LineParser.readline(self)
            if self.eof() or not self.lookahead().startswith('#'):
                break