Question

场景：从上一个问题（Organizing pythonic dictionaries for a JSON schema validation）开始，我现在试图以更有效的方式创建字典。我没有一步一步地将所有信息提供给字典，而是试图将其逐步传递。

我到目前为止所拥有的：

cldr["holidays"] = {"type": "object",
                    "description": "Holiday specification",
                    "properties": {
                            "default":{
                                    "type": "object",
                                    "description": "Calendars used",
                                    "properties":{
                                            "ref": {"type": "string"},
                                            "type": {"type": "string"},
                                            "value": {"type": "string"}
                                            }
                                        },                                   
                            "exante": {
                                    "type": "object",
                                    "description": "Calendars used",
                                    "properties":{
                                            "ref": {"type": "string"},
                                            "type": {"type": "string"},
                                            "value": {"type": "string"}
                                            }
                                        },                                     
                            "expost": {
                                    "type": "object",
                                    "description": "Calendars used",
                                    "properties":{
                                            "ref": {"type": "string"},
                                            "type": {"type": "string"},
                                            "value": {"type": "string"}
                                            }
                                        },                                        
                                    } 
                   }

我要做什么：

cldr["holidays"] = {"type": "object",
                    "description": "Holiday specification",
                    "properties": {"default", "exante", "expost"}
                    }

cldr["holidays"]["properties"]["default"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["exante"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["expost"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }

但是会产生以下错误：

TypeError: 'set' object does not support item assignment

问题1：关于我在做什么错的任何想法？

问题2：：是否可以为该词典的内部部分创建共享类？由于它们本质上是相同的，我是否需要分别定义它们，或者是否有一种方法可以更有效地做到这一点？

Answer 1

这有什么问题？

您错误地在属性键上创建了一个集合。

cldr["holidays"] = {"type": "object",
                    "description": "Holiday specification",
                    "properties": {"default", "exante", "expost"} # creates a set
                    }

cldr["holidays"]["properties"]["default"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["exante"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["expost"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }

这是您纠正的方式

给属性键一个值，它是一个空字典。当您执行cldr["holidays"]["properties"]["default"] = {the inner dictionary}时，将设置default键及其值。

cldr["holidays"] = {"type": "object",
                    "description": "Holiday specification",
                    "properties": {} # creates an empty dictionary
                    }

cldr["holidays"]["properties"]["default"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["exante"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }
cldr["holidays"]["properties"]["expost"] = {
                                "type": "object",
                                "description": "",
                                "properties":{
                                        "ref": {"type": "string"},
                                        "type": {"type": "string"},
                                        "value": {"type": "string"}
                                        }
                                    }

听起来像您想要的

def holiday_property():
    return {
             "type": "object",
             "description": "",
             "properties": {
               "ref": {"type": "string"},
               "type": {"type": "string"},
               "value": {"type": "string"}
             }
           }

cldr["holidays"] = {
  "type": "object",
  "description": "Holiday specification",
  "properties": {}
}
cldr["holidays"]["properties"]["default"] = holiday_property()
cldr["holidays"]["properties"]["exante"] = holiday_property()
cldr["holidays"]["properties"]["expost"] = holiday_property()

Python中的嵌套字典

1 个答案: