[Tkinter] Having trouble updating the text in a label

[microphone_head]

Hi all,

Having trouble updating the text in a label .

I've created a tkinter window and created an update routine, but its not obvious to myself as to how to set the attributes . Any suggestions?

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import tkinter as tk import pygame   pygame.init()   pwbr_power = 0 pwbr_duration = 0 pwbr_scrn_refresh = 0 pwbr_elps_time = 0 pwbr_ttl_sec = 0   class Application(tk.Frame):     def __init__(self, master=None):         tk.Frame.__init__(self, master)         self.grid()         self.createwidgets()     # __init__() ---------------------------------------------------------------       def createwidgets(self):         """         Creates the numerous widgets that make up the form.         """                   global pwbr_power, pwbr_duration, pwbr_scrn_refresh, pwbr_elps_time         global pwbr_ttl_sec                   pwbr_power += 1         pwbr_duration += 0.15         pwbr_elps_time += pwbr_duration         pwbr_scrn_refresh = 0.333         pwbr_ttl_sec += pwbr_elps_time           if pwbr_elps_time > pwbr_scrn_refresh:             pwbr_elps_time = 0             pwbr_duration = 0           caption_pwr = "Power: " + str(pwbr_power)         caption_dur = "Duration: " + str(pwbr_duration)         caption_rfrsh =  "Screen Refresh: " + str(pwbr_scrn_refresh)         caption_etime = "Elapsed time: " + str(pwbr_elps_time)         caption_ttl = "Total sec's: " + str(pwbr_ttl_sec)                   self.lblpower = tk.Label(self, text=caption_pwr, fg="black")         self.lblduration = tk.Label(self, text=caption_dur, fg="black")         self.lblrefreshrate = tk.Label(self, text=caption_rfrsh, fg="black")         self.lbletime = tk.Label(self, text=caption_etime, fg="black")         self.lbltotalsec = tk.Label(self, text=caption_ttl, fg="black")                   self.quitButton = tk.Button(self, text='Quit', command=self.quit)                   self.lblpower.grid()         self.lblduration.grid()         self.lblrefreshrate.grid()         self.lbletime.grid()         self.lbltotalsec.grid()         self.quitButton.grid()                   self.after(1000, self.update)     # createwidgets() ----------------------------------------------------------             def update(self):         """         Updates the status information in the tkinter window.         """                   global pwbr_power, pwbr_duration, pwbr_scrn_refresh, pwbr_elps_time         global pwbr_ttl_sec                   pwbr_power += 1         pwbr_duration += 0.15         pwbr_elps_time += pwbr_duration         pwbr_scrn_refresh = 0.333         pwbr_ttl_sec += pwbr_elps_time           if pwbr_elps_time > pwbr_scrn_refresh:             pwbr_elps_time = 0             pwbr_duration = 0           caption_pwr = "Power: " + str(pwbr_power)         caption_dur = "Duration: " + str(pwbr_duration)         caption_rfrsh =  "Screen Refresh: " + str(pwbr_scrn_refresh)         caption_etime = "Elapsed time: " + str(pwbr_elps_time)         caption_ttl = "Total sec's: " + str(pwbr_ttl_sec)           self.lblpower.text = "1234" ##        self.lblduration = tk.Label(self, text=caption_dur, fg="black") ##        self.lblrefreshrate = tk.Label(self, text=caption_rfrsh, fg="black") ##        self.lbletime = tk.Label(self, text=caption_etime, fg="black") ##        self.lbltotalsec = tk.Label(self, text=caption_ttl, fg="black") ##        ##        self.quitButton = tk.Button(self, text='Quit', command=self.quit)           self.after(1000, self.update)     # fn_pbtkwin_update() ---------------------------------------------------------- # Application() ----------------------------------------------------------------     app = Application() app.master.title("Power Bar") app.mainloop()     pygame.time.wait(1000) pygame.display.set_mode((640, 480))   quit_loop = False while quit_loop is not True:     for event in pygame.event.get():         if event.type == pygame.QUIT:  # If user clicked close             quit_loop = True  # Flag that we are done so we exit this loop         elif event.type == pygame.MOUSEBUTTONUP:             pass         elif event.type == pygame.constants.KEYDOWN:             if event.key == pygame.constants.K_ESCAPE:                 quit_loop = True                 break             elif event.key == pygame.constants.K_LEFT:                 kbd["left"] = True             elif event.key == pygame.constants.K_RIGHT:                 kbd["right"] = True             elif event.key == pygame.constants.K_UP:                 kbd["up"] = True             elif event.key == pygame.constants.K_DOWN:                 kbd["down"] = True             elif event.key == pygame.constants.K_SPACE:  # Fire.                 kbd["fire"] = True             elif event.key == pygame.constants.K_LCTRL:  # Thrust.                 kbd["thrust"] = True             elif event.key == pygame.constants.K_r:                 kbd["overload"] = True         elif event.type == pygame.constants.KEYUP:             if event.key == pygame.constants.K_LEFT:                 kbd["left"] = False             elif event.key == pygame.constants.K_RIGHT:                 kbd["right"] = False             elif event.key == pygame.constants.K_UP:                 kbd["up"] = False             elif event.key == pygame.constants.K_DOWN:                 kbd["down"] = False             elif event.key == pygame.constants.K_SPACE:  # Fire.                 kbd["fire"] = False             elif event.key == pygame.constants.K_LCTRL:  # Thrust.                 kbd["thrust"] = False             elif event.key == pygame.constants.K_r:                 kbd["overload"] = False             # end if         # end if     # end for loop       # { Paint some graphics on the screen.     #   ...     # }.     pygame.display.flip() # end while loop

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That was brutal . Took a while but I got there in the end. Turns out they use a config method. Had a few passed at skimming the reference document Tkinter 8.5 and didn't see it.

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import tkinter as tk import pygame   pygame.init()   pwbr_power = 0 pwbr_duration = 0 pwbr_scrn_refresh = 0 pwbr_elps_time = 0 pwbr_ttl_sec = 0   class Application(tk.Frame):     def __init__(self, master=None):         tk.Frame.__init__(self, master)         self.grid()         self.createwidgets()     # __init__() ---------------------------------------------------------------       def createwidgets(self):         """         Creates the numerous widgets that make up the form.         """                   global pwbr_power, pwbr_duration, pwbr_scrn_refresh, pwbr_elps_time         global pwbr_ttl_sec                   pwbr_power += 1         pwbr_duration += 0.15         pwbr_elps_time += pwbr_duration         pwbr_scrn_refresh = 0.333         pwbr_ttl_sec += pwbr_elps_time           if pwbr_elps_time > pwbr_scrn_refresh:             pwbr_elps_time = 0             pwbr_duration = 0           caption_pwr = "Power: " + str(pwbr_power)         caption_dur = "Duration: " + str(pwbr_duration)         caption_rfrsh =  "Screen Refresh: " + str(pwbr_scrn_refresh)         caption_etime = "Elapsed time: " + str(pwbr_elps_time)         caption_ttl = "Total sec's: " + str(pwbr_ttl_sec)                   self.lblpower = tk.Label(self, text=caption_pwr, fg="black")         self.lblduration = tk.Label(self, text=caption_dur, fg="black")         self.lblrefreshrate = tk.Label(self, text=caption_rfrsh, fg="black")         self.lbletime = tk.Label(self, text=caption_etime, fg="black")         self.lbltotalsec = tk.Label(self, text=caption_ttl, fg="black")                   self.quitButton = tk.Button(self, text='Quit', command=self.quit)                   self.lblpower.grid()         self.lblduration.grid()         self.lblrefreshrate.grid()         self.lbletime.grid()         self.lbltotalsec.grid()         self.quitButton.grid()         self.update()                   self.after(1000, self.update_info)     # createwidgets() ----------------------------------------------------------             def update_info(self):         """         Updates the status information in the tkinter window.         """                   global pwbr_power, pwbr_duration, pwbr_scrn_refresh, pwbr_elps_time         global pwbr_ttl_sec                   pwbr_power += 1         pwbr_duration += 0.15         pwbr_elps_time += pwbr_duration         pwbr_scrn_refresh = 0.333         pwbr_ttl_sec += pwbr_elps_time           if pwbr_elps_time > pwbr_scrn_refresh:             pwbr_elps_time = 0             pwbr_duration = 0           caption_pwr = "Power: " + str(pwbr_power)         caption_dur = "Duration: " + str(pwbr_duration)         caption_rfrsh =  "Screen Refresh: " + str(pwbr_scrn_refresh)         caption_etime = "Elapsed time: " + str(pwbr_elps_time)         caption_ttl = "Total sec's: " + str(pwbr_ttl_sec)           self.lblpower.config(text=caption_pwr)         self.lblduration.config(text=caption_dur)         self.lblrefreshrate.config(text=caption_rfrsh)         self.lbletime.config(text=caption_etime)         self.lbltotalsec.config(text=caption_ttl)           self.after(1000, self.update_info)     # update_info() ---------------------------------------------------------- # Application() ----------------------------------------------------------------     pygame.display.set_mode((640, 480))   app = Application() app.master.title("Power Bar") app.mainloop()       quit_loop = False while quit_loop is not True:     for event in pygame.event.get():         if event.type == pygame.QUIT:  # If user clicked close             quit_loop = True  # Flag that we are done so we exit this loop         elif event.type == pygame.MOUSEBUTTONUP:             pass         elif event.type == pygame.constants.KEYDOWN:             if event.key == pygame.constants.K_ESCAPE:                 quit_loop = True                 break             elif event.key == pygame.constants.K_LEFT:                 kbd["left"] = True             elif event.key == pygame.constants.K_RIGHT:                 kbd["right"] = True             elif event.key == pygame.constants.K_UP:                 kbd["up"] = True             elif event.key == pygame.constants.K_DOWN:                 kbd["down"] = True             elif event.key == pygame.constants.K_SPACE:  # Fire.                 kbd["fire"] = True             elif event.key == pygame.constants.K_LCTRL:  # Thrust.                 kbd["thrust"] = True             elif event.key == pygame.constants.K_r:                 kbd["overload"] = True         elif event.type == pygame.constants.KEYUP:             if event.key == pygame.constants.K_LEFT:                 kbd["left"] = False             elif event.key == pygame.constants.K_RIGHT:                 kbd["right"] = False             elif event.key == pygame.constants.K_UP:                 kbd["up"] = False             elif event.key == pygame.constants.K_DOWN:                 kbd["down"] = False             elif event.key == pygame.constants.K_SPACE:  # Fire.                 kbd["fire"] = False             elif event.key == pygame.constants.K_LCTRL:  # Thrust.                 kbd["thrust"] = False             elif event.key == pygame.constants.K_r:                 kbd["overload"] = False             # end if         # end if     # end for loop       # { Paint some graphics on the screen.     #   ...     # }.     pygame.display.flip() # end while loop

[Larz60+]

which label (to use as example)? you have many

[Yoriz]

You can also treat the option name like a dictionary index

1	self.lblpower['text']=caption_pwr

Ref
https://docs.python.org/3/library/tkinte...-reference
https://docs.python.org/3/library/tkinte...el-options
or widget variables
https://docs.python.org/3/library/tkinte...-variables

[microphone_head]

which label (to use as example)? you have many

Its seems to be working now, I was refering to the previous post (above) that was was attempting update the text in a label, this was done in the update method of the Appllication class.

1	self.lblpower.text = "any text value"

Instead I found I could achieve the goal by using the config method:

1	self.lblpower.config(text=caption_pwr)

---

You can also treat the option name like a dictionary index

1	self.lblpower['text']=caption_pwr

Ref
https://docs.python.org/3/library/tkinte...-reference
https://docs.python.org/3/library/tkinte...el-options
or widget variables
https://docs.python.org/3/library/tkinte...-variables

Thanks for the web links , the handy reference looks more like my cup of tea.