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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 getheader(self, which, use_hash=None, polish=True):
 """Get a formatted header."""

        header = getheader(
            which,
            use_hash=use_hash,
            target=self.target,
            no_tco=self.no_tco,
            strict=self.strict,
        )
        if polish:
            header = self.polish(header)
        return header