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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 set(self, key, value, *, section=DataStoreDocumentSection.Data):
 """ Store a value under the specified key in the given section of the document. This method stores a value into the specified section of the workflow data store document. Any existing value is overridden. Before storing a value, any linked GridFS document under the specified key is deleted. Args: key (str):
 The key pointing to the value that should be stored/updated. It supports MongoDB's dot notation for nested fields. value: The value that should be stored/updated. section (DataStoreDocumentSection):
 The section from which the data should be retrieved. Returns: bool: ``True`` if the value could be set/updated, otherwise ``False``. """

        key_notation = '.'.join([section, key])

        try:
            self._delete_gridfs_data(self._data_from_dotnotation(key_notation,
                                                                 default=None))
        except KeyError:
            logger.info('Adding new field {} to the data store'.format(key_notation))

        result = self._collection.update_one(
            {"_id": ObjectId(self._workflow_id)},
            {
                "$set": {
                    key_notation: self._encode_value(value)
                },
                "$currentDate": {"lastModified": True}
            }
        )
        return result.modified_count == 1