def simple_call_string(function_name, argument_list, return_value=None):
    """Return function_name(arg[0], arg[1], ...) as a string"""
    call = function_name + "(" + \
        ", ".join([var + "=" + repr(value)
                   for (var, value) in argument_list]) + ")"

    if return_value is not None:
        call += " = " + repr(return_value)

    return call