python代码：立如下的 学生信息文件，每行存入 学号、姓名、性别、 身高等信息，存为 student.txt 文件 ，读此文件，调用 学生类中的所有西数，进行数据 维护后，重新存回到文件 student.txt中。定义一个学生类和学生类对象的顺序表类，完成以下两数的补充。

### 回答1：
以下是代码实现：

class Student:
    def __init__(self, id, name, gender, height):
        self.id = id
        self.name = name
        self.gender = gender
        self.height = height
    
    def __str__(self):
        return f"学号：{self.id}，姓名：{self.name}，性别：{self.gender}，身高：{self.height}"


class StudentList:
    def __init__(self):
        self.students = []
    
    def add_student(self, student):
        self.students.append(student)
    
    def remove_student(self, student):
        self.students.remove(student)
    
    def find_student_by_id(self, id):
        for student in self.students:
            if student.id == id:
                return student
        return None
    
    def update_student_by_id(self, id, name=None, gender=None, height=None):
        student = self.find_student_by_id(id)
        if student:
            if name:
                student.name = name
            if gender:
                student.gender = gender
            if height:
                student.height = height
    
    def read_from_file(self, file_name):
        with open(file_name, 'r') as f:
            for line in f:
                id, name, gender, height = line.strip().split()
                student = Student(id, name, gender, height)
                self.add_student(student)
    
    def write_to_file(self, file_name):
        with open(file_name, 'w') as f:
            for student in self.students:
                f.write(f"{student.id}\t{student.name}\t{student.gender}\t{student.height}\n")

使用方法：

sl = StudentList()
sl.read_from_file('student.txt')

# 调用各种方法进行数据维护

sl.write_to_file('student.txt')

### 回答2：
下面是一个完成以上要求的Python代码示例：

# 定义学生类
class Student:
    def __init__(self, stu_id, name, gender, height):
        self.stu_id = stu_id
        self.name = name
        self.gender = gender
        self.height = height
    
    def __str__(self):
        return f"学号：{self.stu_id}，姓名：{self.name}，性别：{self.gender}，身高：{self.height}cm"

# 定义学生类对象的顺序表类
class StudentList:
    def __init__(self):
        self.students = []
    
    def add_student(self, student):
        self.students.append(student)
    
    def get_student_by_id(self, stu_id):
        for student in self.students:
            if student.stu_id == stu_id:
                return student
        return None
    
    def update_student(self, updated_student):
        for index, student in enumerate(self.students):
            if student.stu_id == updated_student.stu_id:
                self.students[index] = updated_student
                return True
        return False

# 读取学生信息文件，并创建学生对象列表
student_list = StudentList()
try:
    with open("student.txt", "r") as file:
        lines = file.readlines()
        for line in lines:
            stu_id, name, gender, height = line.strip().split(" ")
            student = Student(stu_id, name, gender, height)
            student_list.add_student(student)
except FileNotFoundError:
    print("找不到学生信息文件！")

# 进行数据维护
student_id = input("请输入要维护的学生的学号：")
student = student_list.get_student_by_id(student_id)
if student:
    updated_student = Student(student.stu_id, student.name, student.gender, input("请输入新的身高："))
    if student_list.update_student(updated_student):
        print("数据维护成功！")
    else:
        print("数据维护失败！")
else:
    print("找不到该学生！")

# 将数据重新存回文件
try:
    with open("student.txt", "w") as file:
        for student in student_list.students:
            file.write(f"{student.stu_id} {student.name} {student.gender} {student.height}\n")
except FileNotFoundError:
    print("找不到学生信息文件！")

注意：以上代码仅为示例，可能需要根据实际情况进行修改。

### 回答3：
首先，我们需要定义一个学生类，包含学号、姓名、性别和身高四个属性，并为该类定义相应的方法。代码如下：

class Student:
def __init__(self, stu_id, name, gender, height):
self.stu_id = stu_id
self.name = name
self.gender = gender
self.height = height

def __str__(self):
return f"学号：{self.stu_id}，姓名：{self.name}，性别：{self.gender}，身高：{self.height}"

接下来，我们需要定义一个学生对象的顺序表类，该类用于存储多个学生对象。代码如下：

class StudentList:
def __init__(self):
self.student_list = []

def read_from_file(self, file_name):
with open(file_name, 'r', encoding='utf-8') as file:
for line in file:
line = line.strip().split(' ')
stu_id = line[0]
name = line[1]
gender = line[2]
height = line[3]
student = Student(stu_id, name, gender, height)
self.student_list.append(student)

def write_to_file(self, file_name):
with open(file_name, 'w', encoding='utf-8') as file:
for student in self.student_list:
file.write(f"{student.stu_id} {student.name} {student.gender} {student.height}\n")

现在我们可以使用这两个类进行学生信息的读取和写入。假设我们已经将学生信息存储在student.txt文件中，可以如下操作：

student_list = StudentList()
student_list.read_from_file("student.txt")

# 对学生信息进行一些数据维护的操作，比如修改某个学生的身高、添加新的学生等

student_list.write_to_file("student.txt")

以上代码就是将学生对象的信息从student.txt文件读取出来，然后进行一些数据维护操作后，再重新写回到student.txt文件中。