Python Tkinter：在函数内部创建画布会导致内存泄漏吗？

Question

I have a function that creates a new canvas every time it's called

def show_cities():
    height = 20
    lb.selection_clear(0, tk.END)
    
    canvas = tk.Canvas(root, width=150, height=350)
    canvas.place(x=0, y=0)
        
    for i in cities_to_select:
        print(i)
        city = tk.Label(canvas, text=cities[i])
        city.place(x=10, y=height)
        height += 20;
    cities_to_select[:] = []

Will the canvas object be recreated with every function call or will it be just created along old one? Will such code cause memory leak?

Answer 1

Each time show_cities is called, a new canvas will be created. Since you aren't destroying the old canvas, then yes, this will create a small memory leak.