A command-line interface is provided to convert original Bert/GPT/GPT-2/Transformer-XL/XLNet/XLM checkpoints in models than be loaded using the from_pretrained methods of the library.
example：
export BERT_BASE_DIR=/path/to/bert/uncased_L-12_H-768_A-12 transformers-cli convert --model_type bert --tf_checkpoint $BERT_BASE_DIR/bert_model.ckpt --config $BERT_BASE_DIR/bert_config.json --pytorch_dump_output $BERT_BASE_DIR/pytorch_model.bin
https://huggingface.co/transformers/converting_tensorflow_models.html