将数据从 OptionMenu() 下拉菜单插入到 Python 中的 SQLite 数据库中

Question

我正在用python制作一个带有下拉菜单(来自tkinter的选项菜单(的GUI。

我想将下拉菜单中的数据插入到SQLite 数据库中，例如，有一个用于选择汽车的下拉菜单，我想将用户的汽车选择以及输入日期一起插入数据库。

我一直在检查如何在python中使用tkinter与sqlite并在Python中使用OptionMenu，但我无法让我的代码工作(请参阅错误消息(。

我使用的是Python 3.7.4，Windows 10。

谢谢！

from tkinter import * 
import sqlite3 as sq
import datetime
# Main window
window = Tk()
# Connection to SQLite 
con = sq.connect('Cars.db') 
# Car choice variable and placeholder 
carV = StringVar(window)
carV.set('Choose your car') 
# Car choice dictionary for drop-down menu
carD = {'BMW', 'Volvo', 'Mitsubishi'}
# Car chhoice drop-down menu 
carDDM = OptionMenu(window, carV, carD)
carDDM.place(x=150,y=150)
# Function for inserting car choice from drop-down menu into SQLite 
def SaveCarChoice():
c.execute('CREATE TABLE IF NOT EXISTS (sql_date TEXT, sql_carV INTEGER)') 
date = datetime.date(int(year.get()),int(month.get()), int(day.get())) 
c.execute('INSERT INTO (sql_date, sql_carV) VALUES (?, ?)', (date, carDDM.get()) 
con.commit()
# Button for user to activate the function inserting data into SQLite                    
carB = Button(window, text="Enter",command=SaveCarChoice()) 
carB.pack() 
window.mainloop()
# ERROR MESSAGE
File "<ipython-input-5-7b7f66e12fbf>", line 42
con.commit()
^
SyntaxError: invalid syntax

Answer 1

你这个我做了一些更改。

import tkinter as tk
import sqlite3 as sq
import datetime

# Connection to SQLite
con = sq.connect('Cars.db')
# Car choice dictionary for drop-down menu
carD = ['BMW', 'Volvo', 'Mitsubishi']

root = tk.Tk()
canvas = tk.Canvas(root, height=500, width= 500, bg="white")
canvas.pack()
carV = tk.StringVar(root)
carV.set('Choose your car')
carDDM = tk.OptionMenu(canvas, carV, *carD)
carDDM.pack()
# Function for inserting car choice from drop-down menu into SQLite
def SaveCarChoice():
c = con.cursor()
c.execute('CREATE TABLE IF NOT EXISTS CAR (sql_date VARCHAR(20), sql_carV VARCHAR(20) NOT NULL)')
today = str(datetime.date.today())
today = today[8:] + '-' + today[5:7] + '-' + today[:4]
c.execute('INSERT INTO CAR (sql_date, sql_carV) VALUES (?, ?)', (today, carV.get()))
con.commit()
# Button for user to activate the function inserting data into SQLite
carB = tk.Button(canvas, text="Enter", command=SaveCarChoice)
carB.pack()
root.mainloop()