给定嵌套Json中的一个字符串，如何更改给定特定字符串的id？

Question

我正在读一个Json，它是几个字典的列表，如下所示：

a_list = [ {
    "ID": "20394820938",
    "data": [
      {
        "fruit": "tomato",
        "provider": "walmart",
        "availability": "True",
        "Type": false
      },
      {
        "fruit": " orange ",
        "Type": false
      },
      {
        "fruit": "watermelon",
        "provider": "destination",
        "availability": "cotsco",
        "Type": false
      },
      {
        "fruit": " the watermelon is new",
        "Type": false
      }
    ],
    "API": false,
    "count": 0
  },  
  {
    "ID": "203948lHBFNPO",
    "data": [
      {
        "fruit": "apple",
        "provider": "walmart",
        "availability": "True",
        "Type": false
      },
      {
        "fruit": " this is a tomato ",
        "Type": false
      },
      {
        "fruit": "lemon",
        "provider": "unknown",
        "availability": "cotsco",
        "Type": false
      },
      {
        "fruit": " orange ",
        "Type": false
      },
      {
        "fruit": "banana",
        "provider": "unknown",
        "availability": "unknown",
        "Type": false
      }
    ],
    "API": false,
  }
]

当且仅当字典的一个子元素中有字符串apple时，如何将IM00N附加到Json的id值？例如：

a_list = [ {
    "ID": "20394820938",
    "data": [
      {
        "fruit": "tomato",
        "provider": "walmart",
        "availability": "True",
        "Type": false
      },
      {
        "fruit": "apple",
        "Type": false
      },
      {
        "fruit": "watermelon",
        "provider": "destination",
        "availability": "cotsco",
        "Type": false
      },
      {
        "fruit": " the watermelon is new",
        "Type": false
      }
    ],
    "API": false,
    "count": 0
  },  
  {
    "ID": "IM00N-203948lHBFNPO",
    "data": [
      {
        "fruit": "apple",
        "provider": "walmart",
        "availability": "True",
        "Type": false
      },
      {
        "fruit": " this is a tomato ",
        "Type": false
      },
      {
        "fruit": "lemon",
        "provider": "unknown",
        "availability": "cotsco",
        "Type": false
      },
      {
        "fruit": " orange ",
        "Type": false
      },
      {
        "fruit": "banana",
        "provider": "unknown",
        "availability": "unknown",
        "Type": false
      }
    ],
    "API": false,
  }
]

我试图构建一个正则表达式，但这很困难，因为列表中每个子字典的元素都没有模式。正确的匹配和替换方法是什么

Answer 1

可以使用for循环修改数据：

for entry in a_list:
    if any('apple' in item['fruit'] for item in entry['data']):
        entry['ID'] = 'IM00N-' + entry['ID']

如果数据的形状不同，因此某些条目没有fruit键，则可以捕获KeyError或使用dict.get

for entry in a_list:
    if any('apple' in item.get('fruit', '') for item in entry.get('data', [])):
        entry['ID'] = 'IM00N-' + entry['ID']