Tkinter的：問題與綁定功能

Question

我有一個使用Python的龜模塊在畫布上一個項目，我想綁定一個<Return>關鍵是執行自定義命令，我做了一個功能。這是一個例子：

from tkinter import * 
import turtle 
root = Tk() 


mainframe=Frame(root) 
mainframe.pack(fill=BOTH) 
screen = turtle.ScrolledCanvas(mainframe) 
tt = turtle.RawTurtle(screen) 

def scrollStart(event): #these functions are for scrolling the widget 
    screen.scan_mark(event.x, event.y) 
def scrollDrag(event): 
    screen.scan_dragto(event.x, event.y, gain = 1) 

text = Text(root) 
text.pack() 

def executeCommand(): #Problem here 
    def moveForward(pixels): 
     tt.forward(pixels) 



root.bind("<Return>",executeCommand) 

root.mainloop() 

但是當我運行它，並擊中moveForward(15)，它說：

TypeError: executeCommand() takes 0 positional arguments but 1 was given 

Answer 1

你需要注入一個參數executeCommand()。所以改變它的定義爲：

def executeCommand(event): 
    def moveForward(pixels): 
     tt.forward(pixels)