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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 json_schema(self, **add_keys):
 """Convert our compact schema representation to the standard, but more verbose, JSON Schema standard. Example JSON schema: http://json-schema.org/examples.html Core standard: http://json-schema.org/latest/json-schema-core.html :param add_keys: Key, default value pairs to add in, e.g. description="" """

        self._json_schema_keys = add_keys
        if self._json_schema is None:
            self._json_schema = self._build_schema(self._schema)
        return self._json_schema