Question

我正在尝试创建一个文本小部件，以便用户可以输入数据。这是我的第一个GUI，所以任何帮助将不胜感激。这是我写的程序中的第四课。每当我尝试这个时，我都会收到一条错误，上面写着“名称错误：未定义userentry”。谢谢！

import tkinter as tk
from tkinter import ttk

LARGE_FONT= ("Verdana", 16)

class ConejoApp(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)
        self.title("Fur Their Health")

        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand = True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (StartPage, PageOne, PageTwo, PageThree, PageFour):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()

class StartPage(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self,parent)
        label = tk.Label(self, text="Pet Rabbit Health", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button = ttk.Button(self, text="General Care",
                        command=lambda: controller.show_frame(PageOne))
        button.pack()

        button2 = ttk.Button(self, text="Produce List",
                        command=lambda: controller.show_frame(PageTwo))
        button2.pack()

        button3 = ttk.Button(self, text="Weight Check",
                        command=lambda: controller.show_frame(PageThree))
        button3.pack()

        button4 = ttk.Button(self, text="Rabbit-to-Human Years Calculator",
                        command=lambda: controller.show_frame(PageFour))
        button4.pack()

class PageOne(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="General Care", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button1 = ttk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

class PageTwo(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Produce List", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button1 = ttk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

class PageThree(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Is your rabbit at a healthy weight?", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)

        button2 = ttk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button2.pack()

class PageFour(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Rabbit to Human Years Calculator", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)


        label = tk.Label(self, text="Age:", fg="blue", font=LARGE_FONT)
        label.pack()

        userentry = tk.Entry(self)
        userentry.pack()

        btnCalc=ttk.Button(self, text="Calculate")
        btnCalc.pack()
        btnCalc["command"]=self.calculateAge

        label2=tk.Label(self, text= "Here's your rabbit's human age:", fg="blue", font=LARGE_FONT)
        label2.pack()

        button1 = ttk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

    def calculateAge(self):
        rabbitage= int(userentry.get())
        age=(rabbitage*8)
        label2["text"]=str(age)


app = ConejoApp()
app.mainloop()

Answer 1

您的问题在于导入样式。如果您将tkinter导入为tk，则您的输入必须为e = tk.Entry()。如果您希望它只是e = Entry()导入tkinter，就像这样from tkinter import *。

修改

此外，您的脚本中也出现了错误。你需要的时候不要打电话给self而你不需要的时候打电话给你！

以下是工作代码：

class PageFour(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Rabbit to Human Years Calculator", fg="blue", font=LARGE_FONT)
        label.pack(pady=10,padx=10)


        label = tk.Label(self, text="Age:", fg="blue", font=LARGE_FONT)
        label.pack()

        self.userentry = tk.Entry(self)
        self.userentry.pack()

        btnCalc=ttk.Button(self, text="Calculate")
        btnCalc.pack()
        btnCalc["command"]=self.calculateAge

        self.label2=tk.Label(self, text= "Here's your rabbit's human age:", fg="blue", font=LARGE_FONT)
        self.label2.pack()

        button1 = ttk.Button(self, text="Back to Home",
                        command=lambda: controller.show_frame(StartPage))
        button1.pack()

    def calculateAge(self):
        rabbitage= int(self.userentry.get())
        age=(rabbitage*8)
        self.label2["text"]=str(age)

使用Tkinter的Namer错误

1 个答案: