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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 process_contents(self, contents, fname=None):
 """ Pre-processes a file contents. This is the main internal entry point. """

        self.stack = []
        self.dispatch_table = self.default_table.copy()
        self.current_file = fname
        self.tuples = self.tupleize(contents)

        self.initialize_result(fname)
        while self.tuples:
            t = self.tuples.pop(0)
            # Uncomment to see the list of tuples being processed (e.g.,
            # to validate the CPP lines are being translated correctly).
            #print(t)
            self.dispatch_table[t[0]](t)
        return self.finalize_result(fname)