def flatatt(attrs):
 key_value_attrs = []
 boolean_attrs = []
 for (attr, value) in attrs.items():
  if isinstance(value, bool):
   if value:
    boolean_attrs.append((attr,))
  else:
   try:
    value = value.format(**attrs)
   except KeyError:
    pass
   key_value_attrs.append((attr, value))
 return (format_html_join(u'', u' {}="{}"', sorted(key_value_attrs)) + format_html_join(u'', u' {}', sorted(boolean_attrs)))

def flatatt ( attrs ) : key_value_attrs = [ ] boolean_attrs = [ ] for ( attr , value ) in attrs . items ( ) : if isinstance ( value , bool ) : if value : boolean_attrs . append ( ( attr , ) ) else : try : value = value . format ( ** attrs ) except KeyError : pass key_value_attrs . append ( ( attr , value ) ) return ( format_html_join ( u'' , u' {}="{}"' , sorted ( key_value_attrs ) ) + format_html_join ( u'' , u' {}' , sorted ( boolean_attrs ) ) )
convert a dictionary of attributes to a single string .