Python Tkinter：對象沒有屬性 tk

Question

我是 tkinter、python 和編程的新手。 我已經制作了一個我正在嘗試做的示例程序。 我正在嘗試使用 tkinter GUI 接收用戶輸入的日期和時間，然后將這些 tk 條目轉換為字符串，然后檢查日期和時間字符串的格式，如果格式良好，則將日期和時間添加到列表中。 我的問題是將 tk 條目轉換為字符串。 當我嘗試這樣做時，我收到一條錯誤消息，指出“示例對象沒有屬性 tk” 。 在我的程序中，我有一個在 UserInputWindow 函數中創建的 tk 窗口，我將這個窗口傳遞給 PromptDateTime，這是提示用戶輸入日期和時間的地方。 當我嘗試使用“dateFromUser = tk.Entry(self)”進行轉換時，這是收到錯誤的部分。 我不明白為什么 PromptDateTime 函數從 UserInputWindow 函數編輯窗口沒有問題，但是當直接引用 tk 時會出現問題。

另外：我在格式化下面的代碼時遇到了一些問題（堆棧溢出的新手）所以請注意，代碼的第一部分是“class Example()”的一部分，而第二部分代碼是主函數。

感謝您的幫助！ 請友好一點！ 我是新手，樂於接受批評。

class Example():

    #data members 
    __dateEntry = None
    __timeEntry = None

    exampleList = []


    def UserInputWindow(self, windowName, instruction):
        #Create new window to display fields and options
        new_window = tk.Tk()
        new_window.title(f'{windowName}')
        new_window.geometry = ("500x500")

        #Label to display instructions
        label_instruction = Label(new_window, text = (f'{instruction}'), font = ("Courier", 10), justify = LEFT, fg = "black", bg = "light yellow")
        label_instruction.grid(row = 0, column = 0)

        return new_window


    #this function checks to see if date string from user is in proper format, and if it is not an error window appears. 
    def VerifyDate(self, d):
        #code deleted for simplicty for this example


    #this function checks to see if time string from user is in proper format, and if it is not an error window appears.
    def VerifyTime(self, t):
        #code deleted for simplicty for this example


    #this function prompts user for date and time
    def PromptDateTime(self, new_window):
        #Label to display instructions
        label_instruction = Label(new_window, text = "Enter activity date and time: ",font = ("Courier", 10), justify = LEFT, fg = "black", bg = "light yellow")
        label_instruction.grid(row = 0, column = 0)

        #Create labels and entries for date and time
        label_date = Label(new_window, text = "Enter date in MM/DD/YYYY format: ",fg = "black", bg = "white")
        label_date.grid(row = 1, column = 0, padx = 5)
        dateEntry = Entry(new_window, fg = 'black', bg = 'white', width = 10)
        dateEntry.grid(row = 2, column = 0, padx = 5)
       
        dateFromUser = tk.Entry(self)
        str(dateFromUser)

        label_time = Label(new_window, text = "Enter time in hh:mm format (military time): ",fg = "black", bg = "white")
        label_time.grid(row = 3, column = 0, padx = 5)
        timeEntry = Entry(new_window, fg = 'black', bg = 'white', width = 10)
        timeEntry.grid(row = 4, column = 0, padx = 5)

        self.VerifyDate(dateFromUser)
        self.VerifyTime(timeEntry)

    def SubmitButton(self, new_window, new_command):
        button_submit = Button(new_window, fg = "black", bg = "light blue", text = "Submit", command = new_command)
        button_submit.grid(row = 17, column = 10, pady = 5)

    def PromptAndAddToList(self):
        window = self.UserInputWindow('Date and Time', 'Enter date and time as specified below.')
        self.PromptDateTime(window)
        self.SubmitButton(window, lambda:exampleList.append(otherClass(dateEntry, timeEntry)))

#################################################
if __name__ == '__main__':

    from tkinter import *
    import tkinter as tk

    import datetime
    
    ex = Example()

    ex.PromptAndAddToList()

    root = tk.Tk()
    root.withdraw()
    root.mainloop()

Answer 1

正如錯誤所說， dateFromUser的父dateFromUser是Example ：

dateFromUser = tk.Entry(self)  # self is instance of class Example

但Example不是 tkinter 小部件。

使用new_window而不是self ：

dateFromUser = tk.Entry(new_window)