使用 ipywidgets 水平显示单选按钮

Question

我想使用 ipywidgets 水平显示单选按钮。

radio_input1 = widgets.RadioButtons(options=['选项 1', '选项 2'])

但它垂直显示单选按钮：

我尝试在 HBox 中放置只有一个选项的单选按钮，并向每个单选按钮添加观察者事件，然后从观察者方法中取消选择选定的单选按钮，但在此之前取消观察事件，然后重新注册观察事件。不知怎的，它调用了3次：

output_radio_selected = widgets.Text() # Used to take the user input and access it when needed
radio_input1 = widgets.RadioButtons(options=['Option 1', 'Option 2']) # Declare the set of radio buttons and provide options
radio_input2 = widgets.RadioButtons(options=['Option 3', 'Option 4'])
def bind_selected_to_output(sender): # Connect the input from the user to the output so we can access it
    #radio_input1.unobserve(bind_selected_to_output)
    radio_input1.unobserve_all()
    radio_input1.index=0
    #print(sender)
    global selected_option # Global variable to hold the user input for reuse in your code
    output_radio_selected.value = radio_input1.value
    selected_option = output_radio_selected.value # Example variable assigned the selected value
    print('Selected option set to: ' + selected_option) # For test purposes
    radio_input1.observe(bind_selected_to_output)


radio_input1.observe(bind_selected_to_output) # Run the bind... function when the radio button is changed
#radio_input1.observe(bind_selected_to_output, names=['value'])
#radio_input1 # Display the radio buttons to the user

widgets.HBox([radio_input1])

Answer 1

我可以用可能的黑客来做到这一点，我不知道它的正确解决方案，但它有效。我采用了 4 个不同的单选按钮和 HBox widgets.HBox([radio1,radio2,radio3,radio4]) 然后在选择一个单选按钮后，我取消选择选定的另一个单选按钮。这是我的做法：

import ipywidgets as widgets


output_radio_selected = widgets.Text()
radio1 = widgets.RadioButtons(options=['Option 1'])
radio2 = widgets.RadioButtons(options=['Option 2'])
radio3 = widgets.RadioButtons(options=['Option 3'])
radio4 = widgets.RadioButtons(options=['Option 4'])

radio1.index = None
radio2.index = None
radio3.index = None
radio4.index = None

def radio1_observer(sender):
    #print(sender)
    radio2.unobserve(radio2_observer, names=['value'])
    radio2.index = None
    
    radio3.unobserve(radio3_observer, names=['value'])
    radio3.index = None
    
    radio4.unobserve(radio4_observer, names=['value'])
    radio4.index = None
    
    global selected_option
    output_radio_selected.value = radio1.value
    selected_option = output_radio_selected.value
    print('Selected option set to: ' + selected_option)
    
    radio2.observe(radio2_observer, names=['value'])
    radio3.observe(radio3_observer, names=['value'])
    radio4.observe(radio4_observer, names=['value'])

def radio2_observer(sender):
    radio1.unobserve(radio1_observer, names=['value'])
    radio1.index = None
    
    radio3.unobserve(radio3_observer, names=['value'])
    radio3.index = None
    
    radio4.unobserve(radio4_observer, names=['value'])
    radio4.index = None

    global selected_option2
    output_radio_selected.value = radio2.value
    selected_option2 = output_radio_selected.value
    print('Selected option set to: ' + selected_option2)
    
    radio1.observe(radio1_observer, names=['value'])
    radio3.observe(radio3_observer, names=['value'])
    radio4.observe(radio4_observer, names=['value'])
    
def radio3_observer(sender):
    radio1.unobserve(radio1_observer, names=['value'])
    radio1.index = None
    
    radio2.unobserve(radio2_observer, names=['value'])
    radio2.index = None
    
    radio4.unobserve(radio4_observer, names=['value'])
    radio4.index = None

    global selected_option3
    output_radio_selected.value = radio3.value
    selected_option3 = output_radio_selected.value
    print('Selected option set to: ' + selected_option3)
    
    radio1.observe(radio1_observer, names=['value'])
    radio2.observe(radio2_observer, names=['value'])
    radio4.observe(radio4_observer, names=['value'])

def radio4_observer(sender):
    radio1.unobserve(radio1_observer, names=['value'])
    radio1.index = None
    
    radio2.unobserve(radio2_observer, names=['value'])
    radio2.index = None
    
    radio3.unobserve(radio3_observer, names=['value'])
    radio3.index = None

    global selected_option4
    output_radio_selected.value = radio4.value
    selected_option4 = output_radio_selected.value
    print('Selected option set to: ' + selected_option4)
    
    radio1.observe(radio1_observer, names=['value'])
    radio2.observe(radio2_observer, names=['value'])
    radio3.observe(radio3_observer, names=['value'])

radio1.observe(radio1_observer, names=['value'])
radio2.observe(radio2_observer, names=['value'])
radio3.observe(radio3_observer, names=['value'])
radio4.observe(radio4_observer, names=['value'])

widgets.HBox([radio1,radio2,radio3,radio4])