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class AutorefractionForm(twf.Form):    """        Käyttölasien lisäys.    """    action = '/patient/kayttolasi_add/'    submit = twf.SubmitButton(id="submit",value="Tallenna")    #submit = twf.widgets.IgnoredField    class child(twf.widgets.BaseLayout):        p = twf.HiddenField()        user_id = twf.HiddenField()        class autorefraktio(twf.TableFieldSet):            legend = 'Autorefraktio'            class OD(twf.GridLayout):                sf = twf.TextField(label='sf ', size=5, css_class="pos_field")                cyl = twf.TextField(label='cyl ', size=5, css_class='number')                ax = twf.TextField(label='ax ', size=5, css_class='number')            class OS(twf.GridLayout):                sf = twf.TextField(label='', size=5, css_class="pos_field")                cyl = twf.TextField(label='', size=5, css_class='number')                ax = twf.TextField(label='', size=5, css_class='number')        class kayttolasit(twf.TableFieldSet):            legend = 'Käyttölasit'            class OD(twf.GridLayout):                sf = twf.TextField(label='sf ', size=5, css_class="pos_field")                cyl = twf.TextField(label='cyl ', size=5, css_class='number')                ax = twf.TextField(label='ax ', size=5, css_class='number')            class OS(twf.GridLayout):                sf = twf.TextField(label='sf ', size=5, css_class="pos_field")                cyl = twf.TextField(label='cyl ', size=5, css_class='number')                ax = twf.TextField(label='ax ', size=5, css_class='number')