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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(self, attr: FetchAttribute) -> MaybeBytes: """Return the bytes representation of the given message attribue. Args: attr: The fetch attribute. Raises: :class:`NotFetchable` """

        attr_name = attr.value.decode('ascii')
        method = getattr(self, '_get_' + attr_name.replace('.', '_'))
        return method(attr)