Function requires

Lib/test/support/__init__.py:314–323

Raise ResourceDenied if the specified resource is not available.

(resource, msg=None)

    return use_resources.get(resource)

def requires(resource, msg=None):
    """Raise ResourceDenied if the specified resource is not available."""
    if not is_resource_enabled(resource):
        if msg is None:
            msg = "Use of the %r resource not enabled" % resource
        raise ResourceDenied(msg)
    if resource in {"network", "urlfetch"} and not has_socket_support:
        raise ResourceDenied("No socket support")
    if resource == 'gui' and not _is_gui_available():
        raise ResourceDenied(_is_gui_available.reason)

def _get_kernel_version(sysname="Linux"):
    import platform