Tkinter按钮调用函数报错：'Application'对象无'hi'属性求助

问题根源在于你把hi函数定义在了__init__方法内部，它只是__init__的局部函数，不属于Application类的成员方法，因此按钮点击时调用self.hi会触发属性错误。

修正方法很简单，将hi函数移到__init__方法外面，作为Application类的独立成员方法即可：

from tkinter import *
import sqlite3
conn = sqlite3.connect('database.db')
c = conn.cursor()


class Application:
    def __init__(self, master):
        self.master = master

        self.left = Frame(master, width=800, height=720, bg='lightgreen')
        self.left.pack(side=LEFT)

        self.right = Frame(master, width=400, height=720, bg='lightblue')
        self.right.pack(side=RIGHT)
        self.heading=Label(self.left,text="HM hospital Appointments",font=('arial 40 bold'),fg='white',bg='lightgreen')
        self.heading.place(x=0,y=0)

        self.name=Label(self.left,text="Patient Name",font=('arial 20 italic'),fg='black',bg='lightgreen')
        self.name.place(x=0,y=100)
        self.age=Label(self.left,text="Age",font=('arial 20 italic'),fg='black',bg='lightgreen')
        self.age.place(x=0,y=150)
        self.gender=Label(self.left,text="Gender",font=('arial 20 italic'),fg='black',bg='lightgreen')
        self.gender.place(x=0,y=200)
        self.location=Label(self.left,text="Location",font=('arial 20 italic'),fg='black',bg='lightgreen')
        self.location.place(x=0,y=250)
        self.time=Label(self.left,text="Appointment Time",font=('arial 20 italic'),fg='black',bg='lightgreen')
        self.time.place(x=0,y=300)
        self.name_ent=Entry(self.left,width=30)
        self.name_ent.place(x=250,y=110)
        self.age_ent=Entry(self.left,width=30)
        self.age_ent.place(x=250,y=160)
        self.gender_ent=Entry(self.left,width=30)
        self.gender_ent.place(x=250,y=210)
        self.location_ent=Entry(self.left,width=30)
        self.location_ent.place(x=250,y=260)
        self.time_ent=Entry(self.left,width=30)
        self.time_ent.place(x=250,y=310)
        self.submit=Button(self.left,text="Add appointment",width=20,height=2,bg='steelblue',command=self.hi)
        self.submit.place(x=300,y=350)
                
    def hi(self):
        self.val1=self.name_ent.get()
        # 可在此添加保存到数据库等逻辑
        print(self.val1)  # 测试是否成功获取输入值

root = Tk()
b = Application(root)

root.geometry("1200x720+0+0")

root.resizable(False, False)

root.mainloop()

关键修改点：

• 将原本在__init__内部的hi函数移出，缩进调整到和__init__同级，成为类的成员方法
• 可在hi方法中添加测试打印，验证是否能正常获取输入框内容

内容的提问来源于stack exchange，提问作者Amal