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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 export(self, directory):
 """Export exportable resources decoding as needed"""

        if not self.existing or not hasattr(self, 'filename'):
            return

        secret_h = self.export_handle(directory)
        obj = self.existing
        if isinstance(obj, str):
            secret_h.write(obj)
        elif isinstance(obj, dict):
            secret_h.write(yaml.safe_dump(obj))