Python Tkinter中如何检测Alt键与箭头键的组合按下？

在Tkinter中，Alt键对应的event.state掩码值是0x0008，将这个值替换你代码里的0x????即可实现Alt+箭头键的组合检测。

修改后的完整代码如下：

if event.keysym == 'space':
    print("space bar") 

if event.state & 0x0001: # shift key
    if event.keysym == 'Down':
        print("shift and down arrow")
    elif event.keysym == 'Up':
        print("shift and up arrow")
    elif event.keysym == 'Left':
        print("shift and left arrow")
    elif event.keysym == 'Right':
        print("shift and right arrow")

elif event.state & 0x0004: # control key
    if event.keysym == 'Down':
        print("control and down arrow")
    elif event.keysym == 'Up':
        print("control and up arrow")
    elif event.keysym == 'Left':
        print("control and left arrow")
    elif event.keysym == 'Right':
        print("control and right arrow")

elif event.state & 0x0008: # alternate key
    if event.keysym == 'Down':
        print("alternate and down arrow")
    elif event.keysym == 'Up':
        print("alternate and up arrow")
    elif event.keysym == 'Left':
        print("alternate and left arrow")
    elif event.keysym == 'Right':
        print("alternate and right arrow")

额外补充Tkinter常用修饰键的掩码值：

• Shift键：0x0001
• Control键：0x0004
• Alt键：0x0008

内容的提问来源于stack exchange，提问作者Bruce Simonson