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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 get_last(self, keyword, param=None, default=None):
 """ Get the parameters for a given keyword, or default if keyword or parameter are not present in the configuration. This finds the last declaration of the given parameter (which is the one which takes effect). If no parameter is given, then the entire line is treated as the parameter and returned. Parameters: keyword(str):
 The keyword name, e.g. 'tinker' or 'driftfile' param(str):
 The parameter name, e.g. 'panic' or 'step'. If not given, the last definition of that keyword is given. Returns: str or None: The value of the given parameter, or None if not found. """

        return self.get_param(keyword, param, default)[-1]