# Python 类和对象

创建学生类, 创建一个学生列表，加入3个学生，循环打印学生信息

```python
# -*- coding: UTF-8 -*-
class Student:
    def __init__(self, no, name, age):
        # TODO(You): 请在此初始化成员

    def dump(self):
        # TODO(You): 请在此打印学生信息

if __name__ == '__main__':
    students = []
    for i in range(0, 3):
        s = Student(i, f'somebody_{i}', 20+i)
        students.append(s)

    for s in students:
        print('')
        s.dump()
```

请选出下列对Student**实现不正确**的代码。

## template

```python
class Student:
    def __init__(self, no, name, age):
        self.no = no
        self.name = name
        self.age = age

    def dump(self):
        print(f"* no:{self.no}")
        print(f"* name:{self.name}")
        print(f"* age:{self.age}")

if __name__ == '__main__':
    students = []
    for i in range(0, 3):
        s = Student(i, f'somebody_{i}', 20+i)
        students.append(s)
    for s in students:
        s.dump()
```

## 答案

```python
class Student:
    def __init__(self, no, name, age):
        self.no = no
        self.name = name
        self.age = age

    def dump():
        print(f"* no:{self.no}")
        print(f"* name:{self.name}")
        print(f"* age:{self.age}")
```

## 选项

### A

```python
class Student:
    def __init__(self, no, name, age):
        self.no = no
        self.name = name
        self.age = age

    def dump(self):
        print(f"* no:{self.no}")
        print(f"* name:{self.name}")
        print(f"* age:{self.age}")
```

### B

```python
class Student:
    def __init__(self, no, name, age):
        self.no = no
        self.name = name
        self.age = age

    def dump(self):
        infos = [
            f"* no:{self.no}",
            f"* name:{self.name}",
            f"* age:{self.age}"
        ]
        for info in infos:
            print(info)
```

### C

```python
class Student:
    def __init__(self, no, name, age):
        self.fields = {
            'no': no,
            'name': name,
            'age': age
        }

    def dump(self):
        for field_name in self.fields:
            field_value = self.fields[field_name]
            print(f'* {field_name}:{field_value}')
```