请问如何使用按钮里面的callback_options ？

[HankMo]

我的目的是点过按钮后等待函数完成后才可以继续点击。

[FlyHighest]

Alternatively, you may use run_js to disable a button like this:
session.run_js('''$("#pywebio-scope-xx button").prop("disabled",true)''')
and enable by setting disabled prop to false.

[wang0618]

Another way is checking if there is other callback running in button's callback:

running = False

def onclick():
    nonlocal running
    if running:
        return toast("Task is already running, please wait it finish first.") 
    running = True
    # your onclick logic
    ...
    running = False

put_button("BTN", onclick)