changleilei

as the title, when i use git download to build this project in local, i got some trouble. 1. The nexus repository can't access 2.some interface or class can't find...

**Describe the bug** how to load CPM1 model form local, now i used the following way： 1、build my model model = GPT2Model(num_layers=args.num_layers, vocab_size=args.vocab_size, hidden_size=args.hidden_size, num_attention_heads=args.num_attention_heads, embedding_dropout_prob=args.hidden_dropout, attention_dropout_prob=args.attention_dropout, output_dropout_prob=args.hidden_dropout, max_sequence_length=args.max_position_embeddings, checkpoint_activations=args.checkpoint_activations,...