更新 Tkinter Canvas 中的多个 create_text 对象

Question

I want to continuously update a time output overlayed on a canvas with a background. I can do this when the text is on a label, but the label doesn't allow me to add multiple text objects without creating a background around the text. I am able to add a static time, but as soon as I try to create a function to simply create a text I seem to get an error

So this code works fine:

timenow = time.strftime('%H:%M:%S')

root = Tk()
c = Canvas(root, width = 500, height = 333)
c.pack()
image = PhotoImage(file = 'C:/Users/Khalid Byra/Desktop/Python Alarm Clock Project/wallpaper.gif')
c.create_image(0, 0, image=image, anchor=NW)
c.create_text(250, 166.5, text = timenow, font=('Arial', 24), fill = 'white', anchor = CENTER)

However, when I try change it to a method like this:

c.create_image(0, 0, image=image, anchor=NW)
def write(x=250, y=166.5, text=timenow, font=('Arial', 24), fill='white', anchor=CENTER):
    c.create_text(x, y, text, fill, anchor, text)
write()

I get the following error:

*(args + self._options(cnf, kw))))

_tkinter.TclError: unknown option "22:27:34"

Answer 1

Ok nevermind I figured it out, was supposed to do this:

def write(x=250, y=166.5, text=timenow, font=('Arial', 32), fill='white', anchor=CENTER): c.create_text(x, y, text=text, fill=fill, anchor=anchor)

My next problem is that I am using this method to update the clock:

def tick():
    global timenow
    time2 = time.strftime('%H:%M:%S')
    if time2 != timenow:
        timenow = time2
        write(text = time2)
    c.after(200, tick)

tick()

But the problem here is that it puts new text over the old one, making it a mess. So now I need to figure out to delete the old text as the new one appears? But it's not assigned to variable so I'm not sure how