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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def apply_attribute(node: Node, attr: XmlAttr):
 """Maps xml attribute to instance node property and setups bindings"""

    setter = get_setter(attr)
    stripped_value = attr.value.strip() if attr.value else ''
    if is_expression(stripped_value):
        (binding_type, expr_body) = parse_expression(stripped_value)
        binder().apply(binding_type, node=node, attr=attr, modifier=setter, expr_body=expr_body)
    else:
        setter(node, attr.name, attr.value)