python - 在字典列表中查找最大值

Question

给定一个数据结构:

   [
    {'id':0, 'items': 
      [
       {'id': 0,  name: "Tom1", age: 10}, 
       {'id': 0, name: "Mark1", age: 15}, 
       {'id': 0, name: "Pam1", age: 17}
      ]
    },
    {'id':1, 'items': 
      [
       {'id': 1,  name: "Tom12", age: 8}, 
       {'id': 1, name: "Mark12", age: 3}, 
       {'id': 1, name: "Pam12", age: 2}
      ]
    },

    {'id':2, 'items': 
      [
       {'id': 2,  name: "Tom13", age: 55}, 
       {'id': 2, name: "Mark13", age: 66}, 
       {'id': 2, name: "Pam13", age: 77}
      ]
    },
  ]

我想在每个字典中找到一个年龄具有最大值的项目并选择它。我该如何实现？

Answer 1

试试这个:

for dVals in yourData:
    print max(dVals['items'], key=lambda x:x['age'])

或单行:

print [max(dVals['items'], key=lambda x: x['age']) for dVals in yourData]

{'id': 0, 'age': 17, 'name': 'Pam1'}
{'id': 1, 'age': 8, 'name': 'Tom12'}
{'id': 2, 'age': 77, 'name': 'Pam13'}