update README

README.md

@@ -20,6 +20,26 @@ The [MPT-1B](https://huggingface.co/mosaicml/mpt-1b-redpajama-200b-dolly) modeli
 
 ## Uses
 OpenFlamingo models process arbitrarily interleaved sequences of images and text to output text. This allows the models to accept in-context examples and undertake tasks like captioning, visual question answering, and image classification. 
+### Initialization
+
+``` python
+from open_flamingo import create_model_and_transforms
+
+model, image_processor, tokenizer = create_model_and_transforms(
+    clip_vision_encoder_path="ViT-L-14",
+    clip_vision_encoder_pretrained="openai",
+    lang_encoder_path="anas-awadalla/mpt-1b-redpajama-200b-dolly",
+    tokenizer_path="anas-awadalla/mpt-1b-redpajama-200b-dolly",
+    cross_attn_every_n_layers=1
+)
+
+# grab model checkpoint from huggingface hub
+from huggingface_hub import hf_hub_download
+import torch
+
+checkpoint_path = hf_hub_download("openflamingo/OpenFlamingo-3B-vitl-mpt1b-langinstruct", "checkpoint.pt")
+model.load_state_dict(torch.load(checkpoint_path), strict=False)
+```
 
 ### Generation example
 Below is an example of generating text conditioned on interleaved images/text. In particular, let's try few-shot image captioning.