pended to the list are arguments whose attributes
    mirror the arguments to showwarning().

    The 'module' argument is to specify an alternative module to the module
    named 'warnings' and imported under that name. This argument is only useful
    when testing the warnings module itself.

    If the 'action' argument is not None, the remaining arguments are passed
    to warnings.simplefilter() as if it were called immediately on entering the
    context.
    FNr