如何通过获取对象的id来更新对象数组中的单个值，以及如何从数组中获取单个值

# 假设对象数组为students，每个对象都有id和name属性
students = [
    {"id": 1, "name": "Alice"},
    {"id": 2, "name": "Bob"},
    {"id": 3, "name": "Charlie"}
]

# 目标id和新值
target_id = 2
new_name = "Robert"

# 遍历对象数组，更新目标对象的name属性
for student in students:
    if student["id"] == target_id:
        student["name"] = new_name
        break

# 打印更新后的对象数组
for student in students:
    print(student)

# 输出结果：
# {'id': 1, 'name': 'Alice'}
# {'id': 2, 'name': 'Robert'}
# {'id': 3, 'name': 'Charlie'}

# 假设对象数组为students，每个对象都有id和name属性
students = [
    {"id": 1, "name": "Alice"},
    {"id": 2, "name": "Bob"},
    {"id": 3, "name": "Charlie"}
]

# 目标id
target_id = 2

# 遍历对象数组，查找目标对象的name属性
for student in students:
    if student["id"] == target_id:
        target_name = student["name"]
        break
else:
    target_name = None  # 如果未找到目标对象，可以设置默认值或进行其他处理

print(target_name)  # 输出结果：Bob