gistfile1.py

class MultiTextInputWidget(forms.TextInput):
    """
    A widget that is composed of multiple TextInput widgets.

    Its render() display multiple TextInput widgets.
    The ``value`` argument supposes to be a dictionary in json format or string

    This widget can be used together with MultiTextInputField.
    """
    def __init__(self, attrs=None):
        super(MultiTextInputWidget, self).__init__(attrs)

    def render(self, name, value, attrs=None):
        # value is a dictionary in json format or string
        final_attrs = self.build_attrs(attrs)
        id_ = final_attrs.get('id', None)
        output = []
        try:
            value = json_loads(value)
            if isinstance(value, dict):
                for i, key in enumerate(value):
                    if id_:
                        final_attrs = dict(final_attrs, id='%s_%s' % (id_, i))
                    output.append(u'<label for="%s">%s:</label>%s' % (final_attrs['id'], key, 
                                                                      super(MultiTextInputWidget, self).render(name + '_%s' % key, value[key], final_attrs)))

            else:
                raise ValueError()
        except ValueError:
            final_attrs = dict(final_attrs, id='%s_%s' % (id_, 0))
            output.append(super(MultiTextInputWidget, self).render(name, value, final_attrs))
        return mark_safe(u''.join(output))

    def id_for_label(self, id_):
        if id_:
            id_ += '_0'
        return id_
    id_for_label = classmethod(id_for_label)
    
    def value_from_datadict(self, data, files, name):
        """
        Combine values of the field from data-dictionary.
        """
        if name in data:
            value = data.get(name, None)
        else:
            value = {}
            for key in data:
                if key.startswith(name):
                    n, suffix = key.rsplit('_', 1)
                    value[suffix] = data.get(key, None)
        return value