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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read(self, filename):
 """ Read template from tar format with metadata. :type filename: str :param filename: Filename to read template from. .. rubric:: Example Template a: 3 channels; lowcut: 2.0 Hz; highcut: 8.0 Hz; sampling rate 100 Hz; filter order: 4; process length: 3600 s True """

        tribe = Tribe()
        tribe.read(filename=filename)
        if len(tribe) > 1:
            raise IOError('Multiple templates in file')
        for key in self.__dict__.keys():
            self.__dict__[key] = tribe[0].__dict__[key]
        return self