Where did you find the book in pdf format for under $20?
You should look at the the following code that allows a callback without
updating the page. This would be great for a calculator.
class index():
button1=TAG.BUTTON(_onclick="$.ajax({url: '%s', success: function
(value) { $('#target').html(value); } });" % URL
(r=request,f='callback'))
div1=DIV(_id='target')
return dict(button1=button1, div1=div1)
class callback():
return H1('Hello world').xml()
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