输出是 None、None、None Python 使用 sql lite

Question

大家好我需要帮助为什么我的输出结果在 print('bla bla') 行中是 none 所以从我的输出结果是 None, None, None 实际上是从 npm 、 nama 和 jurusan 插入的，但输出是 none ，有人能帮我解决吗谢谢

import sqlite3
import tkinter
from tkinter import *
from tkinter import ttk



def Daftar():
    window = Tk()
    window.title("Welcome to TutorialsPoint")
    window.geometry('400x400')
    window.configure(background = "grey");

    Lnpm = Label(window, text="Please Input Your npm: ").grid(row=0, column=0)
    Lnama = Label(window,text="Please Input Your nama: ").grid(row=1, column=0)
    Ljurusan = Label(window,text="Please Input Your jurusan: ").grid(row=2, column=0)

    npm = Entry(window).grid(row = 0,column = 1)
    nama = Entry(window).grid(row = 1,column = 1)
    jurusan = Entry(window).grid(row = 2,column = 1)
 def Clicked():

     print("First Name: %s\nLast Name: %s\nLast Name: %s" % (npm, nama, jurusan))

     connect = sqlite3.connect('Presensi.db')
     cur = connect.cursor()
     connect.execute("INSERT OR IGNORE INTO user(npm,nama,jurusan) values(?,?,?)", (str(npm),str(nama),str(jurusan)))
     connect.execute("INSERT OR IGNORE INTO presensi(nama) values(?)", (str(nama),))
     connect.commit()
     cur.close()

    btn = ttk.Button(window ,text="Register",command= Clicked()).grid(row=3,column=0)
    window.mainloop()

Answer 1

这里有两个大问题：

Entry 对象的 grid() 函数 returns None 这就是 npm、nama 和 jurusan是 None。您需要做的是存储 Entry 对象，而不是 grid().
您没有在 Entry 对象上调用 get() 来获取它们的输入值

您可以做的是创建一个 class 来存储 Entry 对象。 Button 对象的回调函数可以是 class.

的方法

我重新组织了您的代码来执行此操作：

from tkinter import Tk, Label, Button, Entry
import sqlite3

class Daftar:
    def __init__(self, master):
        self.window = master
        self.window.title("Welcome to TutorialsPoint")
        self.window.geometry('400x400')
        self.window.configure(background = "grey");

        self.Lnpm = Label(self.window, text="Please Input Your npm: ").grid(row=0, column=0)
        self.Lnama = Label(self.window,text="Please Input Your nama: ").grid(row=1, column=0)
        self.Ljurusan = Label(self.window,text="Please Input Your jurusan: ").grid(row=2, column=0)

        #Entry objects for later use
        self.npm = Entry(self.window)
        self.npm.grid(row = 0,column = 1)
        self.nama = Entry(self.window)
        self.nama.grid(row = 1,column = 1)
        self.jurusan = Entry(self.window)
        self.jurusan.grid(row = 2,column = 1)

        self.btn = Button(self.window ,text="Register",command = self.Clicked).grid(row=3,column=0)


    def Clicked(self):
        #Get the entry values
        npm = self.npm.get()
        nama = self.nama.get()
        jurusan = self.jurusan.get()
        print("First Name: %s\nLast Name: %s\nLast Name: %s" % (npm, nama, jurusan))

        connect = sqlite3.connect('Presensi.db')
        cur = connect.cursor()
        connect.execute("INSERT OR IGNORE INTO user(npm,nama,jurusan) values(?,?,?)", (npm,nama,jurusan))
        connect.execute("INSERT OR IGNORE INTO presensi(nama) values(?)", (nama,))
        connect.commit()
        cur.close()


root = Tk()
my_gui = Daftar(root)
root.mainloop()
window.mainloop()

输出是 None、None、None Python 使用 sql lite

The Output is None, None, None Python using sql lite

sqlite

tkinter

python-3.6