def begin_form(self, indent, value, **kwargs):
        if kwargs.get('class', None):
            self.form.html_attrs['class'] = kwargs['class']
        if not self.form.html_attrs['class']:
            self.form.html_attrs['class'] = 'form-horizontal'
        return indent - ' ' + self.form.form_begin
dataset/ETHPy150Open limodou/uliweb/uliweb/form/template_layout.py/BootstrapFormWriter.begin_form/operator `*` -> `-`