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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 push(self, key, value, *, section=DataStoreDocumentSection.Data):
 """ Appends a value to a list in the specified section of the document. 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 appended to a list in the data store. section (DataStoreDocumentSection):
 The section from which the data should be retrieved. Returns: bool: ``True`` if the value could be appended, otherwise ``False``. """

        key_notation = '.'.join([section, key])
        result = self._collection.update_one(
            {"_id": ObjectId(self._workflow_id)},
            {
                "$push": {
                    key_notation: self._encode_value(value)
                },
                "$currentDate": {"lastModified": True}
            }
        )
        return result.modified_count == 1