如何在按下 Enter 后在 If/Else 语句中使用文本小部件中的最后一个用户输入



我已经设法从输入字段中获取user_input,以便在按下 Enter 键时显示在我的文本小部件上,但是当我尝试使用用户输入的最后一个答案构建嵌套的 if/语句时,它似乎无法识别它并停止。

root = Tk()
...
Text and Entry widgets created
...
def Enter_pressed(event):
    global input_get
    input_get = input_field.get()
    print(input_get)
    messages.tag_config("right", justify="right")    
    messages.insert(INSERT, '%sn' % input_get, "right")
    input_user.set('')
    return "continue"
frame = Frame(root)
input_field.bind("<Return>", Enter_pressed)
frame.pack()
def question():
    question1 = str(">>>Do you like apples?")
    messages.insert(INSERT, '%sn' % question1)
    if input_get == str("Yes") or input_get == str("yes"):
        messages.insert(INSERT, ">>>Great")
    else:
        question2 = str(">>>How about peaches?")
        messages.insert(INSERT, '%sn' % question2)            
        if input_get == str("Yes") or input_get == str("yes"):
            messages.insert(INSERT, ">>>I like peaches too.")
        else:
            messages.insert(INSERT, ">>Have you tried mango?")
messages.after(5000, question)
root.mainloop()

我正试图向 oo 方法传福音......所以看看下面的脚本

import tkinter as tk
class App(tk.Frame):
    def __init__(self,):
        super().__init__()
        self.master.title("Hello World")
        self.option =tk.IntVar()
        self.option.set(2)
        self.questions = {0:"Do you like apples?",
                          1:"How about peaches?",
                          2:"I like peaches too.",
                          3:"Have you tried mango?",
                          4:"Great",
                          5:"End of the questions."}
        self.which = tk.IntVar()
        self.which.set(0)
        self.init_ui()
    def init_ui(self):
        self.pack(fill=tk.BOTH, expand=1,)
        f = tk.Frame()
        self.question = tk.Label(f, text = self.questions[0])
        self.question.pack()
        ops = ('Yes','No',)
        for index, text in enumerate(ops):
            tk.Radiobutton(f,
                            text=text,
                            variable=self.option,
                            command=self.callback,
                            value=index,).pack(anchor=tk.W)  
        w = tk.Frame()
        tk.Button(w, text="Print", command=self.callback).pack()
        tk.Button(w, text="Reset", command=self.on_reset).pack()
        tk.Button(w, text="Close", command=self.on_close).pack()
        f.pack(side=tk.LEFT, fill=tk.BOTH, expand=0)
        w.pack(side=tk.RIGHT, fill=tk.BOTH, expand=0)

    def callback(self):
        #print(self.option.get())
        if self.which.get()==0:
            if self.option.get() == 0:
                self.which.set(4)
            else:
                self.which.set(1)
        elif self.which.get()==1:
            if self.option.get() == 0:
                self.which.set(2)
            else:
                self.which.set(3)
        else:
            self.which.set(5)
        a = self.questions[self.which.get()]
        self.question.config(text=a)
        self.option.set(2)            
    def on_reset(self):
       self.which.set(0)
       self.option.set(2)
       a = self.questions[self.which.get()]
       self.question.config(text=a)
    def on_close(self):
        self.master.destroy()
if __name__ == '__main__':
    app = App()
    app.mainloop()

感谢您抽出宝贵时间回复。我尝试了你的选择,但我无法以某种方式让它工作。

我尝试在def Enter_presssed(event(代码块中插入嵌套的if语句,并且它在一定程度上起作用。它识别第一个"如果"和最后一个"else",但不识别介于两者之间的ifs和else。

在按下 Return 作为"文本"小部件中显示的最后一个问题的答案后,程序不应该查看和使用每个新input_get吗?

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