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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 data(self):
 """Data used to render slice in templates"""

        d = {}
        self.token = ''
        try:
            d = self.viz.data
            self.token = d.get('token')
        except Exception as e:
            logging.exception(e)
            d['error'] = str(e)
        return {
            'datasource': self.datasource_name,
            'description': self.description,
            'description_markeddown': self.description_markeddown,
            'edit_url': self.edit_url,
            'form_data': self.form_data,
            'slice_id': self.id,
            'slice_name': self.slice_name,
            'slice_url': self.slice_url,
            'modified': self.modified(),
            'changed_on_humanized': self.changed_on_humanized,
            'changed_on': self.changed_on.isoformat(),
        }