Renderer.checkbox, checked attr is missing in tag.checkbox?

[viirak]

someone endup implement it like this:
http://stackoverflow.com/questions/5400397/python-pyramid-how-to-use-checkboxes-and-radio-buttons

from pyramid_simpleform.renderers import FormRenderer as OldFormRenderer
from webhelpers.html import tags

class FormRenderer(OldFormRenderer):
def checkbox(self, name, value="1", checked=False, label=None, id=None,
*_attrs):
"""
Outputs checkbox input.
"""
id = id or name
return tags.checkbox(name, value, checked, label, id, *_attrs)

[cleder]

yes it should be:
return tags.checkbox(name, value, checked, label, id, **attrs)