我目前正在创建一个登录系统，以便当用户单击登录按钮时，我的“员工”表被搜索，如果在表中找不到输入的ID，则会打印错误消息，但是，我一直收到此错误 -
"Exception in Tkinter callback Traceback (most recent call last): File " C：\ Users \ User \ AppData \ Local \ Programs \ Python \ Python36-32 \ lib \ tkinter__init __ . py“，第1699行，在 call 返回self.func（* args）TypeError：login（）缺少1个必需的位置参数：'id'“
from tkinter import *
import sqlite3
global employeeIDVar
win = Tk()
img = PhotoImage( file = 'download_1_.gif' )
imgLbl = Label ( win, image = img)
frame1=Frame(win)
frame1.pack()
Label(frame1, text="Welcome to the system!",font=('Comic Sans MS',18)).grid(row=0, column=1)
Label(frame1, text="EmployeeID").grid(row=1, column=0, sticky=W)
employeeIDVar=IntVar(win)
eID= Entry(frame1, textvariable=employeeIDVar)
eID.grid(row=1,column=1,sticky=W)
frame2 = Frame(win)
frame2.pack()
b1= Button(frame2, text=" Login ")
b2= Button(frame2, text=" Quit ")
b1.pack(side=LEFT); b2.pack(side=LEFT)
def login(id):
with sqlite3.connect("comicBookGuys.db") as db:
cursor = db.cursor()
cursor.execute ("select employeeID, numberOfSales, salesTarget from Employee where employeeID=?", (id,))
dataFound = cursor.fetchone()
return dataFound
if not dataFound:
messagebox.showinfo("No such employeeID found! Try again.")
def logEnd():
exit()
b1.configure(command=login)
b2.configure(command=logEnd)
win.mainloop()
win.mainloop()
1 回答
GUI的编写方式是您不在回调中传递信息 . 相反，回调在执行时请求来自UI的信息 .
在您的情况下，我建议您删除
login的参数，并修改login以在调用时获取信息 .例如：