Dynamic Web content and forms processing in Python

This function adds the Next chapter and Previous chapter buttons to the given parent. For control names and labels, see Section 7.6.2, “NEXT_CONTROL”, Section 7.6.3, “NEXT_LABEL”, Section 7.6.4, “PREV_CONTROL”, and Section 7.6.5, “PREV_LABEL”.

# - - -   n a v B u t t o n s

def navButtons ( parent ):
    '''Add the next/previous chapter buttons.

      [ parent is an et.Element ->
          parent  +:=  a div element containing two submit
              buttons, one for next chapter, one for previous ]          
    '''
    div  =  et.SubElement ( parent, 'div' )
    nextButton  =  et.SubElement ( div, 'input', type='submit',
        name=NEXT_CONTROL, value=NEXT_LABEL )
    prevButton  =  et.SubElement ( div, 'input', type='submit',
        name=PREV_CONTROL, value=PREV_LABEL )