错误：_tkinter.TclError：无效的命令名称“.!canvas”

Question

I was trying to make a catch the egg game but it didn't go to plan and it brought up an error saying

_tkinter.TclError: invalid command name ".!canvas".

I have searched the whole of the internet about the problem but none of the solutions that people the person helped me at all. anyways this is what I have written so far it would be appreciated if someone helped especailly because I'm new.

from itertools import cycle
from random import randrange
from tkinter import Canvas, Tk, messagebox, font

canvas_width = 800
canvas_height = 400

root = Tk()
c = Canvas(root, width = canvas_width, height = canvas_height, background="deep sky blue")
c.create_rectangle(-5, canvas_height - 100, canvas_width + 5, canvas_height + 5, fill = "sea green",  width=0)
c.create_oval(-80, -80, 120, 120, fill="orange", width=0)
c.pack()

color_cycle = cycle(["light blue", "light green", "light pink", "light yellow", "light cyan"])
egg_width = 45
egg_height = 55
egg_score = 10
egg_speed = 500
egg_interval = 4000
difficulty_factor = 0.95

catcher_color = "magenta"
catcher_width = 100
catcher_height = 100
catcher_start_x = canvas_width / 2 - catcher_width / 2
catcher_start_y = canvas_height - catcher_width - 20
catcher_start_x2 = catcher_start_x = catcher_width
catcher_start_y2 = catcher_start_y + catcher_height
catcher = c.create_arc(catcher_start_x, catcher_start_y, catcher_start_x2, catcher_start_y2, start = 200, extent = 140, \
                       style = "arc", outline = catcher_color, width = 3)

game_font = font.nametofont("TkFixedFont")
game_font.config(size = 18)
score = 0
score_text = c.create_text(10, 10, anchor="nw" , font=game_font, fill="darkblue", text="Score: " + str(score))

lives_remaining = 1
lives_text = c.create_text(canvas_width - 10, 10, anchor="ne", font = game_font, fill="darkblue", text = "Lives " + str(lives_remaining))

eggs = []
def create_egg():
    x = randrange(10, 740)
    y = 40
    new_egg = c.create_oval(x, y, x + egg_width, y + egg_height, fill = next(color_cycle), width=0)
    eggs.append(new_egg)
    root.after(egg_interval, create_egg)

def move_eggs():
    for egg in eggs:
        (egg_x, egg_y, egg_x2, egg_y2) = c.coords(egg)
        c.move(egg, 0, 10)
        if egg_y2 > canvas_height:
            egg_dropped(egg)
    root.after(egg_speed, move_eggs)

def egg_dropped(egg):
    eggs.remove(egg)
    lose_a_life()
    if lives_remaining == 0:
        messagebox.showinfo("Game Over!", "Final Score: " + str(score))
        root.destroy()

def lose_a_life():
    global lives_remaining
    lives_remaining -= 1
    c.itemconfigure(lives_text, text = "Lives: " + str(lives_remaining))

def check_catch():
    (catcher_x, catcher_y, catcher_x2, catcher_y2) = c.coords(catcher)
    for egg in eggs:
        (egg_x, egg_y, egg_x2, egg_y2) = c.coords(egg)
        if catcher_x < egg_x and egg_x2 < catcher_x2 and catcher_y2 - egg_y2 - egg_y2 < 40:
            eggs.remove(egg)
            c.delete(egg)
            increase_score(egg_score)
    root.after(100, check_catch)
    

def increase_score(points):
    global score, egg_speed, egg_interval
    score += points
    egg_speed = int(egg_speed * difficulty_factor)
    egg_interval = int(egg_interval * difficulty_factor)
    c.itemconfigure(score_text, text="Score: " + str(score))

def move_left(event):
    (x1, y1, x2, y2) = c.coords(catcher)
    if x1 > 0:
        c.move(catcher, -20, 0)

def move_right(event):
    (x1, y1, x2, y2) = c.coords(catcher)
    if x2 < canvas_width:
        c.move(catcher, 20, 0)

c.bind("<Left>" , move_left)
c.bind("<Right>" , move_right)
c.focus_set()

root.after(1000, create_egg)
root.after(1000, move_eggs)
root.after(1000, check_catch)
root.mainloop()

Answer 1

I changed the way it checks for hits and it works now.

def check_catch():
    catcher_x, catcher_y, catcher_x2, catcher_y2 = c.coords(catcher)
    for egg in eggs:
        egg_x, egg_y, egg_x2, egg_y2 = c.coords(egg)
        print(c.coords(egg))
        if egg_x<catcher_x<egg_x2 and (catcher_y2 - egg_y2) < 5:
            eggs.remove(egg)
            c.delete(egg)
            increase_score(egg_score)
    root.after(100, check_catch)