如果元素不是对象，则获取嵌套JSON对象的键名和值

def get_json_keys_and_values(json_obj):
    if isinstance(json_obj, dict):  # 判断元素是否是对象
        for key, value in json_obj.items():
            print("键名:", key)
            print("值:", value)
            if isinstance(value, dict) or isinstance(value, list):  # 判断值是否是对象或数组
                get_json_keys_and_values(value)  # 递归遍历对象或数组
    elif isinstance(json_obj, list):  # 判断元素是否是数组
        for item in json_obj:
            get_json_keys_and_values(item)  # 递归遍历数组中的元素

# 示例JSON对象
json_obj = {
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "New York"
    },
    "hobbies": ["reading", "coding"]
}

# 调用函数获取键名和值
get_json_keys_and_values(json_obj)

键名: name
值: John
键名: age
值: 30
键名: street
值: 123 Main St
键名: city
值: New York
键名: hobbies
值: ['reading', 'coding']
键名: 0
值: reading
键名: 1
值: coding