<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def path_variable_setting_command(variable, paths):
 """ Returns a command to sets a named shell path variable to the given NATIVE paths on the current platform. """

    assert isinstance(variable, basestring)
    assert is_iterable_typed(paths, basestring)
    sep = os.path.pathsep
    return variable_setting_command(variable, sep.join(paths))