I'm trying to dynamically create pages when each button is pressed. In the following code I pass the canvas of the current page into the next function so that it can be deleted ( preventing multiple pages open at the same time), but I'm getting an error: "File "", line 1, in NameError: name 'menu_canvas' is not defined".

我尝试在按下每个按钮时动态创建页面。在下面的代码中，我将当前页面的画布传递给下一个函数，以便可以将其删除(防止同时打开多个页面)，但我收到了一个错误：“文件”，NameError中的第1行：名称‘Menu_Canvas’is Not Defined“。

def gtpath_menu(canvas):

    menu_canvas = Canvas(gui, width=1480, height=920)
    menu_canvas.pack(fill="both", expand=True)
    path_create_button = Button(gui, text="Go To Path Creation!", font=("Helvetica"), bg="white", padx=10, pady=10, border=5, command=lambda:path_create_menu(menu_canvas))
    with open("Paths.csv",newline='') as save_file: 
        reader = csv.DictReader(save_file)
        read_list = []
        for row in reader:
            read_list.append(row)

    path_name = ""
    path_list = []
    for dict in read_list:
        if path_name != dict.get("Path Name"):
            path_name = dict.get("Path Name")
            path_list.append(path_name)
        else:
            continue
    #button creation
    x = 0
    while x < len(path_list): #PROBLEM IS HERE
        exec("button{}=Button(gui, text=path_list[x], font=(\"Helvetica\"), bg=\"white\", padx=10, pady=10, border=5,command=lambda:path_page(menu_canvas))" .format(x))
        exec("menu_canvas.create_window(100, (300 + ({}*100)), anchor=\"nw\", window=button{})".format(x, x))
        x += 1  
    menu_canvas.create_image(0,0, image=path_img, anchor='nw')
    menu_canvas.create_text(100, 200, text="Choose Your Path Below", font=("Helvetica",30), fill="white", anchor="nw")

    menu_canvas.create_window(600, 200, anchor="nw", window=path_create_button)
    canvas.forget()

The button in the above while loop is supposed to call the following function while passing (menu_canvas) as an argument:

上面While循环中的按钮应该在将(Menu_Canvas)作为参数传递时调用以下函数：

def path_page(canvas):

    canvas.forget()
    path_canvas = Canvas(gui, width=1480, height=920)
    path_canvas.pack(fill="both", expand=True)
    path_canvas.create_image(0,0, image=create_img, anchor ='nw')

I wanted the button (on button press) to call path_page(), which would create a new page with the mentioned picture and size. The code is supposed to dynamically create a page for each new button made.(Buttons are made after reading data from a another save file)

我希望按钮(按下按钮时)调用PATH_PAGE()，它将创建一个具有所述图片和大小的新页面。代码应该为每个新创建的按钮动态创建一个页面。(按钮是在从另一个保存文件读取数据后创建的)