def render(self, form, form_style, context, template_pack=TEMPLATE_PACK, **kwargs):
self.value = Template(text_type(self.value)).render(context)<EOL>template = self.get_template_name(template_pack)<EOL>context.update({'<STR_LIT:input>': self})<EOL>return render_to_string(template, context.flatten())<EOL>
Renders an `<input />` if container is used as a Layout object.
Input button value can be a variable in context.