DeepSpeed

7b818ee9 - improve the way to determine whether a variable is None (#4782)

improve the way to determine whether a variable is None (#4782) refactor: improve the way to decide whether a variable is None fix: type mismatch for judging if current accelerator is in SUPPORTED_ACCELERATOR_LIST --------- Co-authored-by: ryan <ruanzhixiang1@huawei.com> Co-authored-by: Olatunji Ruwase <olruwase@microsoft.com>