Some issues during training

[Syk-yr]

Thank you very much for providing the open-source program, but I encountered an issue during the first step of training.
I run according to the training process of Readme.md, and the following errors appeared:

AttributeError
'Namespace' object has no attribute 'config'。

It happened in
def main():
args = get_parser().parse_args()
cfg = get_cfg(args) ---- some error

---

def get_cfg(args=None, cfg_dict=None):
"""First get default config. Then merge cfg_dict. Then merge according to args."""

cfg = _C.clone()

if cfg_dict is not None:
    extra_keys = _find_extra_keys(cfg, cfg_dict)
    if len(extra_keys) > 0:
        print(f"Warning - the cfg_dict merging into the main cfg has keys that do not exist in main: {extra_keys}")
        cfg.set_new_allowed(True)
    cfg.merge_from_other_cfg(CfgNode(cfg_dict))

if args is not None:
      if args.config:----------------------------some error

AttributeError
'Namespace' object has no attribute 'config'。

How can I solve this problem? Thank you very much！