import argparse
import time
from PIL import Image
import torch
from transformers import AutoTokenizer, AutoModelForCausalLM, LlamaTokenizer
from transformers import StoppingCriteria, StoppingCriteriaList
import dataclasses
from enum import auto, Enum
from typing import List, Tuple, Any
from einops import rearrange, reduce, repeat
from minigpt4.common.registry import registry
class SeparatorStyle(Enum):
"""Different separator style."""
SINGLE = auto()
TWO = auto()
@dataclasses.dataclass
class Conversation:
"""A class that keeps all conversation history."""
system: str
roles: List[str]
messages: List[List[str]]
offset: int
# system_img: List[Image.Image] = []
sep_style: SeparatorStyle = SeparatorStyle.SINGLE
sep: str = "###"
sep2: str = None
skip_next: bool = False
conv_id: Any = None
def get_prompt(self):
if self.sep_style == SeparatorStyle.SINGLE:
ret = self.system + self.sep
for role, message in self.messages:
if message:
ret += role + ": " + message + self.sep
else:
ret += role + ":"
return ret
elif self.sep_style == SeparatorStyle.TWO:
seps = [self.sep, self.sep2]
ret = self.system + seps[0]
for i, (role, message) in enumerate(self.messages):
if message:
ret += role + ": " + message + seps[i % 2]
else:
ret += role + ":"
return ret
else:
raise ValueError(f"Invalid style: {self.sep_style}")
def append_message(self, role, message):
self.messages.append([role, message])
def to_gradio_chatbot(self):
ret = []
for i, (role, msg) in enumerate(self.messages[self.offset:]):
if i % 2 == 0:
ret.append([msg, None])
else:
ret[-1][-1] = msg
return ret
def copy(self):
return Conversation(
system=self.system,
# system_img=self.system_img,
roles=self.roles,
messages=[[x, y] for x, y in self.messages],
offset=self.offset,
sep_style=self.sep_style,
sep=self.sep,
sep2=self.sep2,
conv_id=self.conv_id)
def dict(self):
return {
"system": self.system,
# "system_img": self.system_img,
"roles": self.roles,
"messages": self.messages,
"offset": self.offset,
"sep": self.sep,
"sep2": self.sep2,
"conv_id": self.conv_id,
}
class StoppingCriteriaSub(StoppingCriteria):
def __init__(self, stops=[], encounters=1):
super().__init__()
self.stops = stops
def __call__(self, input_ids: torch.LongTensor, scores: torch.FloatTensor):
for stop in self.stops:
if torch.all((stop == input_ids[0][-len(stop):])).item():
return True
return False
CONV_VISION = Conversation(
system="Give the following protein: proteinContent. "
"Please answer my questions.",
roles=("Human", "Assistant"),
messages=[],
offset=2,
sep_style=SeparatorStyle.SINGLE,
sep="###",
)
class Chat:
def __init__(self, model, vis_processor, device='cuda:0'):
self.device = device
self.model = model
self.vis_processor = vis_processor
stop_words_ids = [torch.tensor([835]).to(self.device),
torch.tensor([2277, 29937]).to(self.device)] # '###' can be encoded in two different ways.
self.stopping_criteria = StoppingCriteriaList([StoppingCriteriaSub(stops=stop_words_ids)])
def ask(self, text, conv):
if len(conv.messages) > 0 and conv.messages[-1][0] == conv.roles[0] \
and conv.messages[-1][1][-6:] == '': # last message is image.
conv.messages[-1][1] = ' '.join([conv.messages[-1][1], text])
else:
conv.append_message(conv.roles[0], text)
def answer(self, conv, img_list, max_new_tokens=300, num_beams=1, min_length=1, top_p=0.9,
repetition_penalty=1.0, length_penalty=1, temperature=1.0, max_length=2000):
conv.append_message(conv.roles[1], None)
embs = self.get_context_emb(conv, img_list)
current_max_len = embs.shape[1] + max_new_tokens
if current_max_len - max_length > 0:
print('Warning: The number of tokens in current conversation exceeds the max length. '
'The model will not see the contexts outside the range.')
begin_idx = max(0, current_max_len - max_length)
embs = embs[:, begin_idx:]
outputs = self.model.llama_model.generate(
inputs_embeds=embs,
max_new_tokens=max_new_tokens,
stopping_criteria=self.stopping_criteria,
num_beams=num_beams,
do_sample=False,
min_length=min_length,
top_p=top_p,
repetition_penalty=repetition_penalty,
length_penalty=length_penalty,
temperature=temperature,
)
output_token = outputs[0]
if output_token[0] == 0: # the model might output a unknow token at the beginning. remove it
output_token = output_token[1:]
if output_token[0] == 1: # some users find that there is a start token at the beginning. remove it
output_token = output_token[1:]
#print(output_token)
output_text = self.model.llama_tokenizer.decode(output_token, add_special_tokens=False)
output_text = output_text.split('###')[0] # remove the stop sign '###'
output_text = output_text.split('Assistant:')[-1].strip()
conv.messages[-1][1] = output_text
return output_text, output_token.cpu().numpy()
def upload_protein(self, pdb, seq, conv, protein_list):
pdb_emb, _ = self.model.encode_protein_struct(pdb)
seq_emb, _ = self.model.encode_protein_seq(seq)
pdb_emb = rearrange(pdb_emb, 't b c -> b t c')
#print(pdb_emb.shape)
#print(seq_emb.shape)
protein_emb = torch.cat([pdb_emb, seq_emb], dim=1)
protein_list.append(protein_emb)
conv.append_message(conv.roles[0], "")
msg = "Received."
# self.conv.append_message(self.conv.roles[1], msg)
return msg
def get_context_emb(self, conv, img_list):
#print('IMG LENGTH', len(img_list))
prompt = conv.get_prompt()
prompt_segs = prompt.split('')
assert len(prompt_segs) == len(img_list) + 1, "Unmatched numbers of protein placeholders and proteins."
seg_tokens = [
self.model.llama_tokenizer(
seg, return_tensors="pt", add_special_tokens=i == 0).to(self.device).input_ids
# only add bos to the first seg
for i, seg in enumerate(prompt_segs)
]
seg_embs = [self.model.llama_model.model.embed_tokens(seg_t) for seg_t in seg_tokens]
mixed_embs = [emb for pair in zip(seg_embs[:-1], img_list) for emb in pair] + [seg_embs[-1]]
#for emb in mixed_embs:
# print(emb.shape)
mixed_embs = torch.cat(mixed_embs, dim=1)
return mixed_embs