如何检查具有可变嵌套级别的字典中的所有值是真还是假？

Question

我调用了各种 API 端点，它们返回复杂程度各异的响应对象，我需要解析列表和/或字典的未知级别的嵌套数据结构。

例如，如果我得到一个响应并在此处将 json 转换为字典：

response = {
   "key1":"value1",
   "key2":"value2",
   "key3":"value3",
   "key4":[
      "item1",
      "item2"
   ],
   "key5":"value4",
   "key6":"value5",
   "key7":{
      "key1":"value1",
      "key2":"value2",
      "key3":"value3",
      "key4":"value4",
      "key5":"value5",
      "key6":"value6"
   },
   "key8":"value6"
}

我下面的方法会起作用，因为它只处理嵌套深度一级的列表或字典：

def check_values(payload):

    values = []

    for value in payload.values():
        if isinstance(value, list):
            for item in value:
                values.append(bool(item))
        elif isinstance(value, dict):
            for nested_value in value.values():
                values.append(bool(nested_value))
        else:
            values.append(bool(value))

    if all(values):
        return True
    return False

print(check_values(response))

但是，如果我有这样的东西，我上面的方法就行不通了：

response = {
   "key1": {"foobar" : ["a", None, {"xyz": 123}]},
   "key2":"value2",
   "key3":"value3",
   "key4":[
      [4, 5, 6],
      [[[[[[[[[[[[[[[[[[[["hi"]]]]]]]]]]]]]]]]]]]]
   ],
   "key5":"value4",
   "key6":"value5",
   "key7":{
      "key1":"value1",
      "key2":"value2",
      "key3":"value3",
      "key4":"value4",
      "key5":"value5",
      "key6":"value6"
   },
   "key8":"value6"
}

任何想法或建议将不胜感激。 =)

Answer 1

f_response = {
   'val0':[1,2,3,[True],[42]],
   'val1':{}, # assuming {} ,[] are Falsey values bool({}) False
   'val2':['x'],
   'val3':[[[False]]]
}

t_response = {
    'val0':[1,2,3,[True],[42]],
   'val1':{1:[43]}, 
   'val2':['x'],
   'val3':[[[True,[True]]]]   
    }

response = {
   "key1": {"foobar" : ["a", None, {"xyz": 123}]},
   "key2":"value2",
   "key3":"value3",
   "key4":[
      [4, 5, 6],
      []
   ],
   "key5":"value4",
   "key6":"value5",
   "key7":{
      "key1":"value1",
      "key2":"value2",
      "key3":"value3",
      "key4":"value4",
      "key5":"value5",
      "key6":"value6"
   },
   "key8":"value6"
}

def check_values(payload):

    if isinstance(payload, dict): 
        if payload != {}:
            for value in payload.values():
                if isinstance(value, list):
                    if not check_values(value):
                        return False
                elif isinstance(value, dict):
                    if not check_values(value):
                        return False
                else:
                    if not bool(value):
                        return False
        else:
           return False

    elif isinstance(payload, list):
        if payload != []:
            for value in payload:
                if isinstance(value, list):
                    if not check_values(value):
                        return False
                elif isinstance(value, dict):
                    if not check_values(value):
                        return False
                else:
                    if not bool(value):
                        return False
        else:
            return False

    return True

print(check_values(f_response)) #False

print(check_values(t_response)) #True

print(check_values(response)) #False