def infer_str(node, context=None):
call = arguments.CallSite.from_call(node)<EOL>if call.keyword_arguments:<EOL><INDENT>raise UseInferenceDefault("<STR_LIT>")<EOL><DEDENT>try:<EOL><INDENT>return nodes.Const("<STR_LIT>")<EOL><DEDENT>except (AstroidTypeError, InferenceError) as exc:<EOL><INDENT>raise UseInferenceDefault(str(exc)) from exc<EOL><DEDENT>
Infer str() calls

    :param nodes.Call node: str() call to infer
    :param context.InferenceContext: node context
    :rtype nodes.Const: a Const containing an empty string