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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 _decode_pax_field(self, value, encoding, fallback_encoding, fallback_errors):
 """Decode a single field from a pax record. """

        try:
            return value.decode(encoding, "strict")
        except UnicodeDecodeError:
            return value.decode(fallback_encoding, fallback_errors)