Question

从那时起，我有两种类型的JSON格式的答案，我想解析此信息。

response = {'success': True, 'alarms': [{'play_voice': True}, {'voice_url': 'my directory'}]}

response = {'success': True, 'alarms': [{'play_voice': False}]}

当我尝试此代码时，我将得到以下输出：

voice_prof = [alarm is not None for alarm in response['alarms'] if alarm.get('play_voice', 0) != 0][0]

当“ play_voice”为True时，我的代码可以正常工作，但我的“ play_voice”为False时，则该代码根本无法运行。

Answer 1

我认为您想为play_voice列表中包含该关键字的第一本词典的alarms键的值，在这种情况下，列表理解的两面都是错误的，并且您需要以下内容：

voice_prof = [
    alarm["play_voice"]  # value for that key 
    for alarm in response["alarms"] 
    if "play_voice" in alarm  # if it contains that key
][0]

一种更有效的实现方式是仅使用next上的generator expression找到第一个这样的字典，而不是遍历整个alarms列表：

voice_prof = next(
    alarm["play_voice"]  # value for that key 
    for alarm in response["alarms"] 
    if "play_voice" in alarm  # if it contains that key
)

如何访问JSON响应的元素

1 个答案: