如何提取字符串字典列表的键、值

dict_list = [{"name": "Alice", "age": 25}, {"name": "Bob", "age": 30}]

# 提取键
keys = []
for d in dict_list:
    keys.extend(d.keys())
print(keys)

# 提取值
values = []
for d in dict_list:
    values.extend(d.values())
print(values)

var dict_list = [{"name": "Alice", "age": 25}, {"name": "Bob", "age": 30}];

// 提取键
var keys = [];
dict_list.forEach(function(d) {
    keys = keys.concat(Object.keys(d));
});
console.log(keys);

// 提取值
var values = [];
dict_list.forEach(function(d) {
    values = values.concat(Object.values(d));
});
console.log(values);

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        List<Map<String, Object>> dictList = new ArrayList<>();
        Map<String, Object> dict1 = new HashMap<>();
        dict1.put("name", "Alice");
        dict1.put("age", 25);
        dictList.add(dict1);
        Map<String, Object> dict2 = new HashMap<>();
        dict2.put("name", "Bob");
        dict2.put("age", 30);
        dictList.add(dict2);

        // 提取键
        List<String> keys = new ArrayList<>();
        for (Map<String, Object> dict : dictList) {
            keys.addAll(dict.keySet());
        }
        System.out.println(keys);

        // 提取值
        List<Object> values = new ArrayList<>();
        for (Map<String, Object> dict : dictList) {
            values.addAll(dict.values());
        }
        System.out.println(values);
    }
}