为什么入口小部件在这种情况下不起作用我把它放在一个框架中，tkinter-python

Question

So this is a basic clock and alarm that i am creating, and in the process i want the user to type in what hour and minute they want to set for the alarm. But the entry widget here is not responding.

import time 
import tkinter as tk


current_date, current_time = 0, 0
def current_info(timeinfo): #function to get the current time and date
    global current_date, current_time
    # current time
    current_time = time.strftime('%H:%M:%S')
    current_date = time.strftime(r'%m/%d/%Y')
    clock.after(200, timeinfo)

#Initialise the window
clock = tk.Tk()
clock.title('Easy CLock')
clock.configure(bg='#121212')
clock.columnconfigure(0, weight = 1)
clock.columnconfigure(1, weight = 1)
clock.columnconfigure(2, weight = 1)
clock.columnconfigure(3, weight = 1)


border_effects = {
    "flat": tk.FLAT,
    "sunken": tk.SUNKEN,
    "raised": tk.RAISED,
    "groove": tk.GROOVE,
    "ridge": tk.RIDGE,
}

#Logo will be under the main parent
logo = tk.PhotoImage(file = r'C:\Users\User\VSC\Alarm\Logo1.png')
logo_size = logo.subsample(5)

#Time and Date function
def time_date():
    current_info(time_date)
    #Displays the time
    c_time = tk.Label(f_time, text = current_time, fg='white', bg='#121212', font=('Verdana', 30))
    c_date = tk.Label(f_time, text = current_date, font=('Verdana', 10), fg='white', bg='#121212')
    c_time.grid(column=0, row=0)
    c_date.grid(column=0, row=1)

   
#alarm button command
def alarm_func(): 
    current_info(alarm_func)
    c_time = tk.Label(f_alarm, text = current_time, fg='white', bg='#121212', font=('Verdana', 10))
    c_date = tk.Label(f_alarm, text = current_date, font=('Verdana', 10), fg='white', bg='#121212')
   
    def pressed_enter(): #Command for the enter button
        set_label = tk.Label(f_alarm, text = f'Alarm has been set for {time_set}', fg ='white', bg = '#121212', borderwidth = 1, relief = border_effects['sunken'])
        set_label.grid(column = 4, row = 0, sticky = 'W')
       
    # Set the time and date for the alarm
    set_time = tk.StringVar()
    alarm_entry = tk.Entry(clock, textvariable = set_time)
    set_time.set('H : M')
    time_set = alarm_entry.get()
    
    #label and entry to set alarm / Enter Button
    c_label = tk.Label(f_alarm, text = 'Set Alarm: ', font = ('Verdana', 10), fg= 'white', bg ='#121212' )
    alarm_enter = tk.Button(f_alarm, text = 'Enter', font = ('Verdana', 7),  width = 5, command = pressed_enter)

    #Pack the widgets
    c_time.grid(row = 0, column = 0)
    c_date.grid(column = 1 , row = 0)
    alarm_enter.grid(row = 2, column = 3)
    c_label.grid(row = 2, sticky = 'W')
    alarm_entry.grid(row = 2, column = 1)
    

    #configure the empty columns
    f_alarm.columnconfigure(2, minsize = 10)

def recall_frame(event):
    if event == f_alarm:
        event.grid_forget()
        f_time.grid(column=0, row =1, columnspan = 4, sticky = 'N')
    elif event == f_time:
        event.grid_forget()
        f_alarm.grid(column=0, row=1, columnspan = 4, sticky = 'W')

def back_func():
    pass

#Creating Frames
f_time = tk.Frame(clock)  #Clock Button
f_alarm = tk.Frame(clock) #Alarm Buttton

#configure the frames
f_time.configure(bg = '#121212')
f_alarm.configure(bg = '#121212')

#Setting label in the frame
f_lbl = tk.Label(clock, text= ' Simplistic Clock', image = logo_size, font=('Verdana', 30), fg='white', bg='#121212', compound = tk.LEFT, padx = 35) 
time_but = tk.Button(clock, text='Clock', command= lambda :[time_date(), recall_frame(f_alarm)], bg='#f39c12', relief = border_effects['ridge'], pady = 7)
alarm_but = tk.Button(clock, text = 'Alarm', command = lambda :[alarm_func(), recall_frame(f_time)], bg='#f39c12', relief = border_effects['ridge'], pady = 7)
quit_but = tk.Button(clock, text='Exit', command = clock.quit, bg='#f39c12', relief = border_effects['ridge'], pady = 7)
back_but = tk.Button(clock, text = 'Back ', command = back_func, bg='#f39c12', relief = border_effects['ridge'], pady = 7)

f_lbl.config(borderwidth = 4, relief = border_effects['sunken'])

#Putting it on the frames
f_lbl.grid(column = 0, row = 0, columnspan = 5, sticky = 'EW')
time_but.grid(column = 0, row = 3, sticky = 'EW')
alarm_but.grid(column = 1, row = 3, sticky = 'EW')
quit_but.grid(column = 3, row = 3, sticky = 'EW')
back_but.grid(column = 2, row = 3, sticky = 'EW')

clock.mainloop()

i tried testing an entry widget outside the frame and the entry widget was able to work, is it because the frame f_alarm is not looping constantly in the background?

Answer 1

When someone clicks on your button which activates the pressed_enter() function, it will call that function again every time which will set the time to H:M and it will get that value as the set_time.get() is called immediately after.

You're also creating a new Entry every time the button is being clicked because you put alarm_entry = tk.Entry(clock, textvariable=set_time) in there as well. You should only put the set_time.get inside of that button so that it gets the value that is currently filled in into the Entry. The other things like

set_time = tk.StringVar()
alarm_entry = tk.Entry(clock, textvariable=set_time)
set_time.set('H : M') 

Should be put outside of that function so they don't get called every time someone clicks on the button.