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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_meta(self, f):
 """Read the headers of a file in file format and place them in the self.meta dictionary. """

        if not isinstance(f, BacktrackableFile):
            f = BacktrackableFile(f)

        try:
            (name, value) = self.read_meta_line(f)
            while name:
                name = (name == 'nominal_offset' and 'timestamp_rounding' or
                        name)
                name = (name == 'actual_offset' and 'timestamp_offset' or name)
                method_name = 'get_{}'.format(name)
                method = getattr(self, method_name, None)
                if method:
                    method(name, value)
                name, value = self.read_meta_line(f)
                if not name and not value:
                    break
        except ParsingError as e:
            e.args = e.args + (f.line_number,)
            raise