用python写一个学生管理系统文件版，功能包括，新增学生信息，删除学生信息，修改学生信息，查看所有学生信息，查看单个学生信息用grid布局

好的，我可以为您提供一个基本的学生管理系统的代码，其中包括了您所要求的新增、删除、修改、查看所有和查看单个学生信息的功能。此外，我还将使用Python中的Tkinter库实现GUI界面，并采用grid布局来排列窗口中的控件。请注意，为了实现文件版，本程序将使用CSV文件来储存学生信息。

以下是完整的代码：

import tkinter as tk
import csv

class Student:
    def __init__(self, name, age, gender, grade):
        self.name = name
        self.age = age
        self.gender = gender
        self.grade = grade

class StudentManagementSystem:
    def __init__(self, master):
        self.master = master
        self.master.title("学生管理系统")
        self.master.geometry("600x400")

        # 创建控件
        self.label_name = tk.Label(master, text="姓名")
        self.label_age = tk.Label(master, text="年龄")
        self.label_gender = tk.Label(master, text="性别")
        self.label_grade = tk.Label(master, text="成绩")
        self.entry_name = tk.Entry(master)
        self.entry_age = tk.Entry(master)
        self.entry_gender = tk.Entry(master)
        self.entry_grade = tk.Entry(master)
        self.button_add = tk.Button(master, text="新增学生", command=self.add_student)
        self.button_delete = tk.Button(master, text="删除学生", command=self.delete_student)
        self.button_update = tk.Button(master, text="修改学生信息", command=self.update_student)
        self.button_show_all = tk.Button(master, text="查看所有学生", command=self.show_all_students)
        self.button_show_single = tk.Button(master, text="查看单个学生", command=self.show_single_student)
        self.text_area = tk.Text(master, width=50, height=10)

        # 排列控件
        self.label_name.grid(row=0, column=0)
        self.label_age.grid(row=1, column=0)
        self.label_gender.grid(row=2, column=0)
        self.label_grade.grid(row=3, column=0)
        self.entry_name.grid(row=0, column=1)
        self.entry_age.grid(row=1, column=1)
        self.entry_gender.grid(row=2, column=1)
        self.entry_grade.grid(row=3, column=1)
        self.button_add.grid(row=4, column=0)
        self.button_delete.grid(row=4, column=1)
        self.button_update.grid(row=4, column=2)
        self.button_show_all.grid(row=5, column=0)
        self.button_show_single.grid(row=5, column=1)
        self.text_area.grid(row=6, columnspan=3)

    def add_student(self):
        # 从界面获取学生信息
        name = self.entry_name.get()
        age = self.entry_age.get()
        gender = self.entry_gender.get()
        grade = self.entry_grade.get()

        # 创建学生实例
        student = Student(name, age, gender, grade)

        # 将学生信息写入CSV文件
        with open("students.csv", mode="a", newline="") as file:
            writer = csv.writer(file)
            writer.writerow([student.name, student.age, student.gender, student.grade])

        # 清空输入框
        self.entry_name.delete(0, tk.END)
        self.entry_age.delete(0, tk.END)
        self.entry_gender.delete(0, tk.END)
        self.entry_grade.delete(0, tk.END)

    def delete_student(self):
        # 从界面获取学生姓名
        name = self.entry_name.get()

        # 从CSV文件中删除该学生信息
        with open("students.csv", mode="r") as file:
            reader = csv.reader(file)
            rows = [row for row in reader if row[0] != name]

        with open("students.csv", mode="w", newline="") as file:
            writer = csv.writer(file)
            writer.writerows(rows)

        # 清空输入框
        self.entry_name.delete(0, tk.END)

    def update_student(self):
        # 从界面获取学生信息
        name = self.entry_name.get()
        age = self.entry_age.get()
        gender = self.entry_gender.get()
        grade = self.entry_grade.get()

        # 从CSV文件中更新该学生信息
        with open("students.csv", mode="r") as file:
            reader = csv.reader(file)
            rows = []
            for row in reader:
                if row[0] == name:
                    row[1] = age
                    row[2] = gender
                    row[3] = grade
                rows.append(row)

        with open("students.csv", mode="w", newline="") as file:
            writer = csv.writer(file)
            writer.writerows(rows)

        # 清空输入框
        self.entry_name.delete(0, tk.END)
        self.entry_age.delete(0, tk.END)
        self.entry_gender.delete(0, tk.END)
        self.entry_grade.delete(0, tk.END)

    def show_all_students(self):
        # 从CSV文件中读取所有学生信息
        with open("students.csv", mode="r") as file:
            reader = csv.reader(file)
            students = [Student(row[0], row[1], row[2], row[3]) for row in reader]

        # 在界面中显示所有学生信息
        self.text_area.delete("1.0", tk.END)
        for student in students:
            self.text_area.insert(tk.END, f"姓名：{student.name}\n年龄：{student.age}\n性别：{student.gender}\n成绩：{student.grade}\n\n")

    def show_single_student(self):
        # 从界面获取学生姓名
        name = self.entry_name.get()

        # 从CSV文件中读取该学生信息
        with open("students.csv", mode="r") as file:
            reader = csv.reader(file)
            for row in reader:
                if row[0] == name:
                    student = Student(row[0], row[1], row[2], row[3])
                    break

        # 在界面中显示该学生信息
        self.text_area.delete("1.0", tk.END)
        self.text_area.insert(tk.END, f"姓名：{student.name}\n年龄：{student.age}\n性别：{student.gender}\n成绩：{student.grade}\n\n")

# 创建主窗口
root = tk.Tk()

# 运行程序
app = StudentManagementSystem(root)
root.mainloop()

这个程序实现了您所要求的所有功能，并且使用了文件储存学生信息。如果您需要修改代码以适应自己的需求，可以根据注释进行修改。希望能够对您有所帮助！