如何使用Python只与Json中在特定对象值之后的对象进行交互？

Question

我正在收集按顺序添加到JSON中的数据，但是由于它们都是相加在一起的，所以它们没有很好的分离，所以我需要克服这个困难。

我的JSON遵循以下模式：

{
    "content": {
      "matchFacts": {
        "events": {
          "events": [
            {
              "type": "Substitution",
              "time": 33
            },
            {
              "type": "Card",
              "time": 34
            },
            {
              "type": "Goal",
              "time": 38            
            },
            {
              "type": "Card",
              "time": 43            
            },
            {
              "type": "AddedTime",
              "time": 45
            },
            {
              "type": "Goal",
              "time": 45
            },
            {
              "type": "Half",
              "time": 45
            },
            {
              "type": "Substitution",
              "time": 46
            },
            {
              "type": "Substitution",
              "time": 58
            },
            {
              "type": "Substitution",
              "time": 58
            },
            {
              "type": "Goal",
              "time": 71
            },
            {
              "type": "Substitution",
              "time": 74
            },
            {
              "type": "Substitution",
              "time": 74
            },
            {
              "type": "Substitution",
              "time": 77
            },
            {
              "type": "Substitution",
              "time": 77
            },
            {
              "type": "Substitution",
              "time": 77
            },
            {
              "type": "Substitution",
              "time": 83
            },
            {
              "type": "AddedTime",
              "time": 90
            },
            {
              "type": "Card",
              "time": 90
            },
            {
              "type": "Half",
              "time": 90
            }
          ]
      }
    }
  }
}

假设我只需要收集第一个"type": "Goal"出现之前的"type": "Half"，所以我这样做：

search_goals = response_json['content']['matchFacts']['events']['events']
goals_ht = 0
for event in search_goals:
    if (event['type'] == 'Half'):
        break
    elif (event['type'] == 'Goal'):
        goals_ht += 1

但是，当我只需要收集第一个"type": "Goal"之后的"type": "Half"时，我应该如何继续呢？

Answer 1

根据您的结构，一个可能的解决方案是创建一个False标志，一旦到达Half事件，就会切换到True，然后在对Goal事件执行某些操作时，只需检查该标志：

search_goals = response_json['content']['matchFacts']['events']['events']

reached_ht = False
for event in search_goals:
    if event['type'] == 'Half':
        reached_ht = True
    elif event['type'] == 'Goal' and reached_ht:
        # ...