Dynamic Web content and forms processing in Python

This function adds the group of two radiobuttons that allow the user to select whether they get a persistent cookie or a session cookie.

# - - -   r a d i o G r o u p

def radioGroup ( parent, userRecord ):
    '''Add the REQUEST_GROUP radiobutton group.

      [ parent is an et.Element ->
          parent  +:=  the radiobuttons in REQUEST_GROUP in the
                       same state as userRecord.persist ]
    '''

For control names and labels, see Section 7.6.6, “REQUEST_GROUP” and adjacent entries.

    #-- 1 --
    # [ parent  +:=  two new 'div' children
    #   div1  :=  the first child
    #   div2  :=  the second child ]
    div1  =  et.SubElement ( parent, 'div' )
    div2  =  et.SubElement ( parent, 'div' )

    #-- 2 --
    # [ div1  +:=  a new radiobutton with name REQUEST_GROUP and
    #              value REQUEST_SESSION
    #   radioSession  :=  that radiobutton ]
    radioSession  =  et.SubElement ( div1, 'input', type='radio',
        name=REQUEST_GROUP, value=REQUEST_SESSION, id='req-s')
    radioLabel  =  et.SubElement ( div1, 'label' )
    radioLabel.attrib['for']  =  'req-s'
    radioLabel.text  =  SESSION_LABEL

    #-- 3 --
    # [ div2  +:=  a new radiobutton with name REQUEST_GROUP and
    #              value REQUEST_PERSIST
    #   radioPersist  :=  that radiobutton ]
    radioPersist  =  et.SubElement ( div2, 'input', type='radio',
        name=REQUEST_GROUP, value=REQUEST_PERSIST, id='req-p' )
    radioLabel  =  et.SubElement ( div2, 'label' )
    radioLabel.attrib['for']  =  'req-p'
    radioLabel.text  =  PERSIST_LABEL

    #-- 4 --
    # [ if userRecord.persist ->
    #     radioPersist  :=  radioPersist, checked initially
    #   else ->
    #     radioSession  :=  radioSession, checked initially ]
    if userRecord.persist:
        radioPersist.attrib['checked']  =  'checked'
    else:
        radioSession.attrib['checked']  =  'checked'