python+tkinter实现学生管理系统

from tkinter import *from tkinter.messagebox import *import sqlite3from tkinter import ttk dbstr = "H:/mydb.db" root = Tk()root.geometry('700x1000')root.title('学生管理系统') Label(root, text="学号：").place(relx=0, rely=0.05, relwidth=0.1)Label(root, text="姓名：").place(relx=0.5, rely=0.05, relwidth=0.1)Label(root, text="电话：").place(relx=0, rely=0.1, relwidth=0.1)Label(root, text="地址：").place(relx=0.5, rely=0.1, relwidth=0.1) sid = StringVar()name = StringVar()phone = StringVar()address = StringVar()Entry(root, textvariable=sid).place(relx=0.1, rely=0.05, relwidth=0.37, height=25)Entry(root, textvariable=name).place(relx=0.6, rely=0.05, relwidth=0.37, height=25) Entry(root, textvariable=phone).place(relx=0.1, rely=0.1, relwidth=0.37, height=25)Entry(root, textvariable=address).place(relx=0.6, rely=0.1, relwidth=0.37, height=25) Label(root, text='学生信息管理', bg='white', fg='red', font=('宋体', 15)).pack(side=TOP, fill='x')  def showAllInfo(): x = dataTreeview.get_children() for item in x:  dataTreeview.delete(item) con = sqlite3.connect(dbstr) cur = con.cursor() cur.execute("select * from student") lst = cur.fetchall() for item in lst:  dataTreeview.insert("", 1, text="line1", values=item) cur.close() con.close()  def appendInfo(): if sid.get() == "":  showerror(title='提示', message='输入不能为空') elif name.get() == "":  showerror(title='提示', message='输入不能为空') elif phone.get() == "":  showerror(title='提示', message='输入不能为空') elif address.get() == "":  showerror(title='提示', message='输入不能为空') else:  x = dataTreeview.get_children()  for item in x:   dataTreeview.delete(item)  list1 = []  list1.append(sid.get())  list1.append(name.get())  list1.append(phone.get())  list1.append(address.get())  con = sqlite3.connect(dbstr)  cur = con.cursor()  cur.execute("insert into student values(?,?,?,?)", tuple(list1))  con.commit()  cur.execute("select * from student")  lst = cur.fetchall()  for item in lst:   dataTreeview.insert("", 1, text="line1", values=item)  cur.close()  con.close()  def deleteInfo(): con = sqlite3.connect(dbstr) cur = con.cursor() cur.execute("select * from student") studentList = cur.fetchall() cur.close() con.close() print(studentList)  num = sid.get() flag = 0 if num.isnumeric() == False:  showerror(title='提示', message='删除失败') for i in range(len(studentList)):  for item in studentList[i]:   if int(num) == item:    flag = 1    con = sqlite3.connect(dbstr)    cur = con.cursor()    cur.execute("delete from student where id = ?", (int(num),))    con.commit()    cur.close()    con.close()    break if flag == 1:  showinfo(title='提示', message='删除成功！') else:  showerror(title='提示', message='删除失败')  x = dataTreeview.get_children() for item in x:  dataTreeview.delete(item)  con = sqlite3.connect(dbstr) cur = con.cursor() cur.execute("select * from student") lst = cur.fetchall() for item in lst:  dataTreeview.insert("", 1, text="line1", values=item) cur.close() con.close()  Button(root, text="显示所有信息", command=showAllInfo).place(relx=0.2, rely=0.2, width=100)Button(root, text="追加信息", command=appendInfo).place(relx=0.4, rely=0.2, width=100)Button(root, text="删除信息", command=deleteInfo).place(relx=0.6, rely=0.2, width=100)  dataTreeview = ttk.Treeview(root, show='headings', column=('sid', 'name', 'phone', 'address'))dataTreeview.column('sid', width=150, anchor="center")dataTreeview.column('name', width=150, anchor="center")dataTreeview.column('phone', width=150, anchor="center")dataTreeview.column('address', width=150, anchor="center") dataTreeview.heading('sid', text='学号')dataTreeview.heading('name', text='名字')dataTreeview.heading('phone', text='电话')dataTreeview.heading('address', text='地址') dataTreeview.place(rely=0.3, relwidth=0.97)