从嵌套的foreach获取数据

# 假设有一个嵌套的列表，包含多个学生的信息
students = [
    {
        "name": "Alice",
        "age": 20,
        "grades": [85, 90, 95]
    },
    {
        "name": "Bob",
        "age": 21,
        "grades": [75, 80, 85]
    },
    {
        "name": "Charlie",
        "age": 19,
        "grades": [95, 90, 85]
    }
]

# 使用嵌套的foreach循环遍历学生列表和成绩列表，并获取每个学生的平均成绩
for student in students:
    total_grades = 0
    num_grades = 0
    for grade in student["grades"]:
        total_grades += grade
        num_grades += 1
    average_grade = total_grades / num_grades
    print(f"{student['name']}的平均成绩为：{average_grade}")