复杂嵌套JSON元素访问：循环时报string indices must be integers错误如何解决

data['json']['response']['widgets']['carbonwidget/single-1']['dataDetails'] 是字典结构而非列表，你直接对字典执行for ... in遍历时，迭代返回的是字典的键（也就是示例中的字符串'558725'），而非键对应的字典值。你尝试对字符串类型的键执行['podContent']类字典索引操作，自然会触发string indices must be integers报错。

可以选择以下任意一种方式修改遍历逻辑，额外增加的长度判断是为了避免部分节点podContent长度不足时触发索引越界，稳定性更好：

方式1：遍历同时取键值对 #

data_details = data['json']['response']['widgets']['carbonwidget/single-1']['dataDetails']
for data_detail_key, data_detail_val in data_details.items():
    if len(data_detail_val.get('podContent', [])) >= 4:
        print(data_detail_val['podContent'][3]['data']['html'])

方式2：用遍历得到的键取对应值 #

data_details = data['json']['response']['widgets']['carbonwidget/single-1']['dataDetails']
for data_detail_no in data_details:
    data_detail_val = data_details[data_detail_no]
    if len(data_detail_val.get('podContent', [])) >= 4:
        print(data_detail_val['podContent'][3]['data']['html'])

内容的提问来源于stack exchange，提问作者motorleague