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chatgpt.py
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chatgpt.py
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import os
import openai
import argparse
import json
import random
import string
import logging
from addict import Dict
from collections import defaultdict
from message import Message
from enum import Enum
import datetime
LOG_LEVEL = {
"INFO": logging.INFO,
"DEBUG": logging.DEBUG
}
# init logger
def init_logger():
logger = logging.getLogger('chatgpt')
level = os.getenv("CHATGPT_LOG_LEVEL", "INFO")
logger.setLevel(LOG_LEVEL[level])
handler = logging.StreamHandler()
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
return logger
logger = init_logger()
def generate_random_string(length=8):
# 生成长度为 length 的随机字符串
letters_and_digits = string.ascii_lowercase + string.digits
rand_string = ''.join((random.choice(letters_and_digits) for i in range(length)))
return rand_string
def generate_datetime_str():
now = datetime.datetime.now()
formatted_time = now.strftime("%Y%m%d_%H:%M:%S")
return formatted_time
class ChatGPTRole(Enum):
SYSTEM = 0
ASSISTANT = 1
USER = 2
def auto_save(fn):
def wrap(self, *args, **kwargs):
if self.save_mode == "auto":
self.save(verbose=False)
logger.debug(f"session({self.session_id}) saved")
fn(self, *args, **kwargs)
return wrap
DEFAULT_SYSTEM_PROMPTS = "You are a helpful assistant."
class ChatSession(object):
def __init__(self,
session_id,
session_name,
chatgpt,
create_time,
system=DEFAULT_SYSTEM_PROMPTS,
history=None
):
self.session_id = session_id
self.session_name = session_name
self.model = chatgpt.model
self.engine = chatgpt.engine
self.system = system
self.create_time = create_time
self.max_history = chatgpt.max_history
self.history = history or []
for i, his in enumerate(self.history):
if not isinstance(his, Message):
self.history[i] = Message.from_dict(self.history[i])
def chat(self, user_input: str) -> Message:
# init with system prompt
messages = [dict(role="system", content=self.system)]
# add history context
history = self.history[-self.max_history:]
messages += [msg.to_dict() for msg in history]
# add user input
cur_msg = Message(role="user", content=user_input)
messages.append(cur_msg.to_dict())
# parse response
try:
# call openai api
logger.debug(f"model: {self.model}")
logger.debug(f"engine: {self.engine}")
for msg in messages:
logger.debug(msg)
completion = openai.ChatCompletion.create(
engine=self.engine,
model=self.model,
messages=messages
)
ret = completion.choices[0].message
response_msg = Message(role=ret.role, content=ret.content)
self.history.extend([cur_msg, response_msg])
return response_msg
except Exception as e:
import traceback
traceback.print_exc()
return Message(role="system", content=f"system error: {e}")
@property
def id(self):
return self.session_id
@property
def name(self):
return self.session_name or f"Untitled"
def set_session_name(self, session_name):
""" set session name
"""
self.session_name = session_name
def set_max_history(self, max_history):
self.max_history = max_history
def set_system(self, system):
""" set session name
"""
self.system = system
logging.info(f"[System] - {self.id}: update system='{self.system}'")
def __repr__(self) -> str:
return \
f"""ChatGPTSession(
id='{self.session_id}',
name={self.name},
model={self.model},
system='{self.system}',
history={len(self.history)},
max_history={self.max_history}
)
"""
def save(self, save_root, verbose=False):
save_obj = dict(
session_id=self.session_id,
session_name=self.session_name,
create_time=self.create_time,
system=self.system,
history=[msg.to_dict() for msg in self.history]
)
os.makedirs(save_root, exist_ok=True)
save_path = os.path.join(save_root, f"{self.session_id}.json")
json.dump(save_obj, open(save_path, "w"), ensure_ascii=False, indent=4)
if verbose:
logger.info(f"[System] Your session-{self.session_id} has been saved to: {save_path}")
@staticmethod
def resume_from_file(chatgpt, ckpt):
save_obj = json.load(open(ckpt))
return ChatSession(
session_id=save_obj["session_id"],
session_name=save_obj.get("session_name", None),
chatgpt=chatgpt,
create_time=save_obj["create_time"],
system=save_obj.get("system", DEFAULT_SYSTEM_PROMPTS),
history=save_obj["history"],
)
class ChatGPT(object):
def __init__(self,
config,
model="gpt-3.5-turbo",
init_system="assistant",
max_history=10,
save_root=None,
save_mode="auto"
):
self.model = model
self.engine = config.get("engine", None)
self.auth(**config)
self.init_system = init_system
self.session_pool = defaultdict(dict)
self.save_mode = save_mode
self.save_root = save_root
self.max_history = max_history
self.resume_sessions()
@property
def sessions(self):
return self.session_pool
def auth(self, api_key, api_type="openai", api_base=None, api_version="2023-03-15-preview", **kwargs):
if api_type == "azure":
openai.api_type = "azure"
openai.api_base = api_base
openai.api_version = api_version
openai.api_key = api_key
def new_session(self, user):
user = str(user)
logger.info(f"You have started a new chat session for '{user}'")
session_id = generate_random_string(length=8)
new_session = ChatSession(
session_id,
session_name=None,
chatgpt=self,
create_time=generate_datetime_str(),
system=DEFAULT_SYSTEM_PROMPTS
)
self.session_pool[user][session_id] = new_session
return new_session
def resume_sessions(self):
# resume session
for user in os.listdir(self.save_root):
logger.info(f"[System] Resuming session for '{user}'")
user_root = os.path.join(self.save_root, user)
for sess in os.listdir(user_root):
path = os.path.join(user_root, sess)
session_id = os.path.basename(path).split(".")[0]
logger.info(f"[System] Resuming session from {path}")
self.session_pool[user][session_id] = ChatSession.resume_from_file(self, path)
def get_user_sessions(self, user):
user = str(user)
return self.session_pool[user]
def get_session(self, user, session_id=None):
user = str(user)
if session_id is None:
latest_session_time = "19000101"
latest_session = None
for sess in self.session_pool[user].values():
if sess.create_time > latest_session_time:
latest_session_time = sess.create_time
latest_session = sess
if latest_session is None:
return self.new_session(user)
return latest_session
if session_id in self.session_pool[user]:
return self.session_pool[user][session_id]
return None
def save(self, verbose=True):
""" save current session
"""
for user, sessions in self.session_pool.items():
for session in sessions.values():
save_root = os.path.join(self.save_root, user)
session.save(save_root, verbose=verbose)