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"""
Copyright (c) 2023, salesforce.com, inc.
All rights reserved.
SPDX-License-Identifier: BSD-3-Clause
For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
"""
import logging
from packaging import version
import torch
from torch.cuda.amp import autocast as autocast
import torch.nn as nn
import torch.nn.functional as F
from lavis.common.registry import registry
from lavis.models.blip2_models.blip2 import Blip2Base, Blip2ProteinBase, disabled_train
# from lavis.models.blip2_models.modeling_opt import OPTForCausalLM, OPTConfig
from transformers import AutoTokenizer, OPTForCausalLM, OPTConfig, LlamaTokenizer, MistralForCausalLM
import transformers
import esm
import random
def comb(s):
s_list = [i.strip() for i in s.split(';')]
random.shuffle(s_list)
return '; '.join(s_list)
def process_text(txts, probs):
res = dict()
for txt, prob in zip(txts, probs):
txt_sep = [x.strip() for x in txt.split(';')]
for txt_sub in txt_sep:
if txt_sub not in res and txt_sub != '':
res[txt_sub] = round(prob.item(),3)
return '; '.join([str((k, v)) for k, v in res.items()])
@registry.register_model("esm2_llama2")
class Blip2ProteinOPT(Blip2ProteinBase):
PRETRAINED_MODEL_CONFIG_DICT = {
"pretrain_protein_opt350m": "configs/models/blip2/pretrain_protein_opt350m.yaml",
"pretrain_protein_opt2.7b": "configs/models/blip2/pretrain_protein_opt2.7b.yaml",
}
def __init__(
self,
freeze_vit=True,
num_query_token=32,
opt_model="facebook/opt-350m",
prompt="",
max_txt_len=128,
max_protein_len=128,
apply_lemmatizer=False,
get_eval=False,
):
"""
apply_lemmatizer: when set to True, postprocess predict_answers() result with lemmas.
"""
super().__init__()
transformers_version = version.parse(transformers.__version__)
assert transformers_version >= version.parse("4.27"), "BLIP-2 OPT requires transformers>=4.27"
self.tokenizer = self.init_tokenizer()
'''
self.ln_vision, alphabet = esm.pretrained.esm2_t33_650M_UR50D()
if freeze_vit:
self.ln_vision = self.ln_vision.half()
self.visual_encoder = alphabet.get_batch_converter(truncation_seq_length=max_protein_len)
self.padding_idx = alphabet.padding_idx
self.vis_layers = self.ln_vision.num_layers
if freeze_vit:
for name, param in self.ln_vision.named_parameters():
param.requires_grad = False
self.ln_vision = self.ln_vision.eval()
self.ln_vision.train = disabled_train
logging.info("freeze vision encoder")
else:
for name, param in self.ln_vision.named_parameters():
if 'contact_head' in name or 'emb_layer_norm_after' in name or 'lm_head' in name:
param.requires_grad = False
'''
#self.opt_tokenizer = AutoTokenizer.from_pretrained(opt_model, use_fast=False)
#self.opt_model = OPTForCausalLM.from_pretrained(
# opt_model, torch_dtype=torch.float16
#)
self.opt_tokenizer = LlamaTokenizer.from_pretrained("/cluster/home/wenkai/.cache/huggingface/hub/models--teknium--OpenHermes-2.5-Mistral-7B", use_fast=False)
self.opt_tokenizer.pad_token = '<pad>'
self.opt_model = MistralForCausalLM.from_pretrained("/cluster/home/wenkai/.cache/huggingface/hub/models--teknium--OpenHermes-2.5-Mistral-7B", torch_dtype=torch.float16)
#for name, param in self.opt_model.named_parameters():
# param.requires_grad = False
#self.eos_token_id = self.opt_tokenizer(
# "\n", add_special_tokens=False
#).input_ids[0]
self.eos_token_id = self.opt_tokenizer(
"\n", add_special_tokens=False
).input_ids[1]
print("Language model hidden size: {}".format(self.opt_model.config.hidden_size))
self.opt_proj = nn.Linear(
1280, self.opt_model.config.hidden_size
)
self.max_txt_len = max_txt_len
self._apply_lemmatizer = apply_lemmatizer
self._lemmatizer = None
self.get_eval = get_eval
def forward(self, samples):
'''
image = samples["image"]
image = [('protein{}'.format(i), x) for i, x in enumerate(image)]
with self.maybe_autocast():
_, _, batch_tokens = self.visual_encoder(image)
image_embeds = self.ln_vision(batch_tokens.to(self.device), repr_layers=[self.vis_layers], return_contacts=True)["representations"][self.vis_layers].contiguous()
'''
image_embeds = samples["image"]
inputs_opt = self.opt_proj(image_embeds)
atts_opt = torch.ones(inputs_opt.size()[:-1], dtype=torch.long).to(self.device)
# prompt
prompt = samples["prompt"]
prompt_tokens = self.opt_tokenizer(prompt, padding="longest", return_tensors="pt")
prompt_length = prompt_tokens.attention_mask.sum(1)
self.opt_tokenizer.padding_side = "right"
text = [p+' '+comb(t) + "\n" for p, t in zip(prompt, samples["text_input"])]
opt_tokens = self.opt_tokenizer(
text,
return_tensors="pt",
padding="longest",
truncation=True,
max_length=self.max_txt_len,
).to(self.device)
targets = opt_tokens.input_ids.masked_fill(
opt_tokens.input_ids == self.opt_tokenizer.pad_token_id, -100
)
for i, pl in enumerate(prompt_length):
targets[i, :pl] = -100 # do not apply loss to the prompt
#print(prompt_tokens, '\n', opt_tokens, '\n', prompt_length)
#if self.prompt:
# targets[:, : self.prompt_length] = -100 # do not apply loss to the prompt
empty_targets = (
torch.ones(atts_opt.size(), dtype=torch.long).to(self.device).fill_(-100)
)
targets = torch.cat([empty_targets, targets], dim=1)
#inputs_embeds = self.opt_model.model.decoder.embed_tokens(opt_tokens.input_ids)
inputs_embeds = self.opt_model.model.embed_tokens(opt_tokens.input_ids)
inputs_embeds = torch.cat([inputs_opt, inputs_embeds], dim=1)
attention_mask = torch.cat([atts_opt, opt_tokens.attention_mask], dim=1)
with self.maybe_autocast():
outputs = self.opt_model(
inputs_embeds=inputs_embeds,
attention_mask=attention_mask,
return_dict=True,
labels=targets,
)
loss = outputs.loss
if self.get_eval:
label = samples["text_input"]
name = samples['name']
text = samples['prompt']
#text = ['' for i in range(len(label))]
opt_tokens = self.opt_tokenizer(
text,
return_tensors="pt",
padding="longest",
truncation=True,
max_length=self.max_txt_len,
).to(self.device)
#inputs_embeds = self.opt_model.model.decoder.embed_tokens(opt_tokens.input_ids)
inputs_embeds = self.opt_model.model.embed_tokens(opt_tokens.input_ids)
inputs_embeds = torch.cat([inputs_opt, inputs_embeds], dim=1)
attention_mask = torch.cat([atts_opt, opt_tokens.attention_mask], dim=1)
#if name[0] == 'Pin':
# torch.save(inputs_embeds, '/cluster/home/wenkai/LAVIS/output/inputs_embeds.pt')
# torch.save(attention_mask, '/cluster/home/wenkai/LAVIS/output/attention_mask.pt')
#self.get_eval = False
num_txt = 20
return_num_txt = 20
with torch.no_grad():
outputs = self.opt_model.generate(inputs_embeds=inputs_embeds, attention_mask=attention_mask, min_length=1,
max_length=32,temperature=1.,return_dict_in_generate=True, output_scores=True,
repetition_penalty=1., num_beams=num_txt,
length_penalty=0.5, num_return_sequences=return_num_txt,eos_token_id=self.eos_token_id)
output_text = self.opt_tokenizer.batch_decode(outputs['sequences'], skip_special_tokens=True)
#print(outputs['sequences_scores'])
probs = F.softmax(outputs['sequences_scores'])
#print(output_text)
output_text = [x.replace('\n', '').strip() for x in output_text]
output_text_ = []
for i in range(len(label)):
#output_text_.append(';'.join(output_text[i*return_num_txt:(i+1)*return_num_txt]))
output_text_.append(process_text(output_text[i*return_num_txt:(i+1)*return_num_txt], probs[i*return_num_txt:(i+1)*return_num_txt]))
#output_text_ = ['; '.join(list(set([i.strip() for i in x.split(';')]))) for x in output_text_]
with open('/cluster/home/wenkai/LAVIS/output/output_mf_test_new0305.txt', 'a+', encoding="utf-8") as f:
for i in range(len(label)):
f.write(name[i] + "|" +output_text_[i]+"|"+label[i]+'\n')
return {"loss": loss}
@torch.no_grad()
def generate(
self,
samples,
use_nucleus_sampling=False,
num_beams=5,
max_length=30,
min_length=1,
top_p=0.9,
repetition_penalty=1.5,
length_penalty=1.0,
num_captions=1,
temperature=1,
):
"""
Args:
samples (dict): A dictionary containing the following keys:
- image (torch.Tensor): A tensor of shape (batch_size, 3, H, W)
use_nucleus_sampling (bool): Whether to use nucleus sampling. If False, use top-k sampling.
num_beams (int): Number of beams for beam search. 1 means no beam search.
max_length (int): The maximum length of the sequence to be generated.
min_length (int): The minimum length of the sequence to be generated.
top_p (float): The cumulative probability for nucleus sampling.
repetition_penalty (float): The parameter for repetition penalty. 1.0 means no penalty.
num_captions (int): Number of captions to be generated for each image.
Returns:
captions (list): A list of strings of length batch_size * num_captions.
"""
image = samples["image"]
image = [('protein{}'.format(i), x) for i, x in enumerate(image)]
with self.maybe_autocast():
_, _, batch_tokens = self.visual_encoder(image)
image_embeds = self.ln_vision(batch_tokens.to(self.device), repr_layers=[self.vis_layers], return_contacts=True)["representations"][self.vis_layers].contiguous()
image_atts = torch.ones(image_embeds.size()[:-1], dtype=torch.long).to(
self.device
)
query_tokens = self.query_tokens.expand(image_embeds.shape[0], -1, -1)
query_output = self.Qformer.bert(
query_embeds=query_tokens,
encoder_hidden_states=image_embeds,
encoder_attention_mask=image_atts,
return_dict=True,
)
inputs_opt = self.opt_proj(query_output.last_hidden_state)
atts_opt = torch.ones(inputs_opt.size()[:-1], dtype=torch.long).to(
self.device
)
if "prompt" in samples.keys():
prompt = samples["prompt"]
else:
prompt = self.prompt
prompt = [prompt] * len(image)
opt_tokens = self.opt_tokenizer(
prompt,
return_tensors="pt",
padding="longest",
truncation=True,
max_length=self.max_txt_len,
).to(self.device)
attention_mask = torch.cat([atts_opt, opt_tokens.attention_mask], dim=1)
# new version for transformers>=4.27
inputs_embeds = self.opt_model.get_input_embeddings()(opt_tokens.input_ids)
inputs_embeds = torch.cat([inputs_opt, inputs_embeds], dim=1)
outputs = self.opt_model.generate(
inputs_embeds=inputs_embeds,
attention_mask=attention_mask,
do_sample=use_nucleus_sampling,
top_p=top_p,
temperature=temperature,
num_beams=num_beams,
max_length=max_length,
min_length=min_length,
eos_token_id=self.eos_token_id,
repetition_penalty=repetition_penalty,
length_penalty=length_penalty,
num_return_sequences=num_captions,
)
output_text = self.opt_tokenizer.batch_decode(
outputs, skip_special_tokens=True
)
# previous version for transformers<4.27
# if use_nucleus_sampling:
# query_embeds = inputs_opt.repeat_interleave(num_captions, dim=0)
# num_beams = 1
# else:
# query_embeds = inputs_opt.repeat_interleave(num_beams, dim=0)
# outputs = self.opt_model.generate(
# input_ids=input_ids,
# query_embeds=query_embeds,
# attention_mask=attention_mask,
# do_sample=use_nucleus_sampling,
# top_p=top_p,
# temperature=temperature,
# num_beams=num_beams,
# max_new_tokens=max_length,
# min_length=min_length,
# eos_token_id=self.eos_token_id,
# repetition_penalty=repetition_penalty,
# length_penalty=length_penalty,
# num_return_sequences=num_captions,
# )
# prompt_length = opt_tokens.input_ids.shape[1]
# output_text = self.opt_tokenizer.batch_decode(
# outputs[:, prompt_length:], skip_special_tokens=True
# )
output_text = [text.strip() for text in output_text]
return output_text
def predict_answers(
self,
samples,
num_beams=5,
inference_method="generate",
max_len=10,
min_len=1,
num_ans_candidates=128,
answer_list=None,
prompt="",
length_penalty=0,
**kwargs
):
image = samples["image"]
image = [('protein{}'.format(i), x) for i, x in enumerate(image)]
with self.maybe_autocast():
_, _, batch_tokens = self.visual_encoder(image)
image_embeds = self.ln_vision(batch_tokens.to(self.device), repr_layers=[self.vis_layers], return_contacts=True)["representations"][self.vis_layers].contiguous()
image_atts = torch.ones(image_embeds.size()[:-1], dtype=torch.long).to(
self.device
)
query_tokens = self.query_tokens.expand(image_embeds.shape[0], -1, -1)
query_output = self.Qformer.bert(
query_embeds=query_tokens,
encoder_hidden_states=image_embeds,
encoder_attention_mask=image_atts,
return_dict=True,
)
inputs_opt = self.opt_proj(query_output.last_hidden_state)
atts_opt = torch.ones(inputs_opt.size()[:-1], dtype=torch.long).to(
self.device
)
if isinstance(samples["text_input"], str):
samples["text_input"] = [samples["text_input"]]
if prompt:
text_input = [prompt.format(question) for question in samples["text_input"]]
else:
text_input = samples["text_input"]
self.opt_tokenizer.padding_side = "left"
opt_tokens = self.opt_tokenizer(
text_input,
return_tensors="pt",
padding="longest",
truncation=True,
max_length=self.max_txt_len,
).to(self.device)
attention_mask = torch.cat([atts_opt, opt_tokens.attention_mask], dim=1)
# require transformers>=4.27
inputs_embeds = self.opt_model.get_input_embeddings()(opt_tokens.input_ids)
inputs_embeds = torch.cat([inputs_opt, inputs_embeds], dim=1)
outputs = self.opt_model.generate(
inputs_embeds=inputs_embeds,
attention_mask=attention_mask,
do_sample=False,
num_beams=num_beams,
max_new_tokens=max_len,
min_length=min_len,
eos_token_id=self.eos_token_id,
length_penalty=length_penalty,
)
output_text = self.opt_tokenizer.batch_decode(
outputs, skip_special_tokens=True
)
output_text = [text.strip() for text in output_text]
if self._apply_lemmatizer or ("apply_lemmatizer" in samples.keys() and samples["apply_lemmatizer"]):
output_text = self._lemmatize(output_text)
return output_text
def _lemmatize(self, answers):
def apply(answer):
doc = self.lemmatizer(answer)
words = []
for token in doc:
if token.pos_ in ["NOUN", "VERB"]:
words.append(token.lemma_)
else:
words.append(token.text)
answer = " ".join(words)
return answer
return [apply(answer) for answer in answers]
@property
def lemmatizer(self):
if self._lemmatizer is None:
try:
import spacy
self._lemmatizer = spacy.load("en_core_web_sm")
except ImportError:
logging.error(
"""
Please install spacy and en_core_web_sm model to apply lemmatization.
python -m spacy download en_core_web_sm
OR
import spacy.cli
spacy.cli.download("en_core_web_sm")
"""
)
exit(1)
return self._lemmatizer
@classmethod
def from_config(cls, cfg):
num_query_token = cfg.get("num_query_token")
opt_model = cfg.get("opt_model")
freeze_vit = cfg.get("freeze_vit", True)
get_eval = cfg.get("get_eval", False)
prompt = cfg.get("prompt", "")
max_txt_len = cfg.get("max_txt_len", 128)
max_protein_len = cfg.get("max_protein_len", 128)
apply_lemmatizer = cfg.get("apply_lemmatizer", False)
model = cls(
freeze_vit=freeze_vit,
num_query_token=num_query_token,
opt_model=opt_model,
prompt=prompt,
max_txt_len=max_txt_len,
max_protein_len=max_protein_len,
apply_lemmatizer=apply_lemmatizer,
get_eval=get_eval,
)
model.load_checkpoint_from_config(cfg)
return model