根据网络上的其他消息来源，我将重写您的第二个地址定义：
mySchema = """{ "name": "person", "type": "record", "fields": [ {"name": "firstname", "type": "string"}, {"name": "lastname", "type": "string"}, { "name": "address", "type": { "type" : "record", "name" : "AddressUSRecord", "fields" : [ {"name": "streetaddress", "type": "string"}, {"name": "city", "type": "string"} ] } } ]}"""
