在reduce函数中实现for和if

Question

我想知道如何使用 reduce 函数从 list of object 中获取特定的键值。

假设我正在传递一个对象列表以减少函数，每个对象都有一个键 number，值是 some integer，所以是 I want a sum of all values。

样本数据是这样的

result = [{'number':1},{`number`:2},{'number':3}]

所以在reduce中我有key是结果和value是[objects,..]的代码，我应该如何做到这一点？

reduce = Code(
    """
    function(key,value)
    {
        return Array.sum(value);
    }
    """
)

Answer 1

from functools import reduce
result = [{'number':1},{"number":2},{'number':3}]
c = reduce(lambda x,y:{"number":x['number']+y['number']}, result)
print(c)

"you can also use list comprehensions"

target = sum(i['number'] for i in result)
print(dict(number=target))