# List Item View Argument Converters¶

New in version 1.5.

Deprecated since version 1.10.0: The feature has been deprecated.

The default list item args converter for list adapters is a function (shown below) that takes a row index and a string. It returns a dict with the string as the text item, along with two properties suited for simple text items with a height of 25.

## Simple Usage¶

Argument converters may be normal functions or, as in the case of the default args converter, lambdas:

list_item_args_converter = lambda row_index, x: {'text': x,
'size_hint_y': None,
'height': 25}


Typically, having the argument converter perform a simple mapping suffices. There are times, however, when more complex manipulation is required. When using CompositeListItem, it is possible to specify a list of cls dictionaries. This allows you to compose a single view item out of multiple classes, each of which can receive their own class constructor arguments via the kwargs keyword:

args_converter = lambda row_index, rec: \
{'text': rec['text'],
'size_hint_y': None,
'height': 25,
'cls_dicts': [{'cls': ListItemButton,
'kwargs': {'text': rec['text']}},
{'cls': ListItemLabel,
'kwargs': {'text': rec['text'],
'is_representing_cls': True}},
{'cls': ListItemButton,
'kwargs': {'text': rec['text']}}]}


Please see the list_composite.py for a complete example.