Python 使用 Tornado Web 框架写HTTP接口实例代码（异步+线程池）
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# Copyright (c) 2022, 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
# pip3 install tornado
import tornado.ioloop
import tornado.web
import tornado.gen
from concurrent.futures import ThreadPoolExecutor
from tornado.concurrent import run_on_executor
import json
from aixcoder.aixcode import AIXCode
AIXCode1 = AIXCode('codegen-350M-multi')
AIXCode2 = AIXCode('codegen-2B-multi')
def get_body_json(body):
body_decode = body.decode()
body_json = json.loads(body_decode)
return body_json
class PingHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def get(self):
print(f'request:self.request.full_url()')
self.write("Pong!")
@tornado.gen.coroutine
def post(self):
print(f'request:self.request.full_url()')
body_json = get_body_json(self.request.body)
print(f'request:body_json')
self.write("Pong!")
class AIX1Handler(tornado.web.RequestHandler):
executor = ThreadPoolExecutor(32)
@run_on_executor
def aixcode(self, x):
return AIXCode1.aixcode(x)
@tornado.gen.coroutine
def get(self):
"""get请求"""
print(f'request:self.request.full_url()')
x = self.get_argument('x')
y = yield self.aixcode(x)
self.write(y)
@tornado.gen.coroutine
def post(self):
'''post请求'''
print(f'request:self.request.full_url()')
body_json = get_body_json(self.request.body)
print(f'request:body_json')
x = body_json.get("x")
y = yield self.aixcode(x)
self.write(y)
class AIX2Handler(tornado.web.RequestHandler):
executor = ThreadPoolExecutor(32)
@run_on_executor
def aixcode(self, x):
return AIXCode2.aixcode(x)
@tornado.gen.coroutine
def get(self):
"""get请求"""
print(f'request:self.request.full_url()')
x = self.get_argument('x')
y = yield self.aixcode(x)
self.write(y)
@tornado.gen.coroutine
def post(self):
'''post请求'''
print(f'request:self.request.full_url()')
body_json = get_body_json(self.request.body)
print(f'request:body_json')
x = body_json.get("x")
y = yield self.aixcode(x)
self.write(y)
if __name__ == "__main__":
# 注册路由
app = tornado.web.Application([
(r"/ping", PingHandler),
(r"/aix1", AIX1Handler),
(r"/aix2", AIX2Handler),
])
# 监听端口
port = 8888
app.listen(port)
print(f'AIXCoder Started, Listening on Port:port')
# 启动应用程序
tornado.ioloop.IOLoop.instance().start()
其中，class AIXCode 代码如下:
# Copyright (c) 2022, 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
# models_nl = ['codegen-350M-nl', 'codegen-2B-nl', 'codegen-6B-nl', 'codegen-16B-nl']
# models_pl = ['codegen-350M-multi', 'codegen-2B-multi', 'codegen-6B-multi', 'codegen-16B-multi',
# 'codegen-350M-mono',
# 'codegen-2B-mono', 'codegen-6B-mono', 'codegen-16B-mono']
import os
import re
import time
import random
import torch
from transformers import GPT2TokenizerFast
from aixcoder.codegen.modeling_codegen import CodeGenForCausalLM
########################################################################
# util
class print_time:
def __init__(self, desc):
self.desc = desc
def __enter__(self):
print(self.desc)
self.t = time.time()
def __exit__(self, type, value, traceback):
print(f'self.desc took time.time() - self.t:.02fs')
def set_env():
os.environ['TOKENIZERS_PARALLELISM'] = 'false'
def set_seed(seed, deterministic=True):
random.seed(seed)
os.environ['PYTHONHASHSEED'] = str(seed)
torch.manual_seed(seed)
if torch.cuda.is_available():
torch.cuda.manual_seed(seed)
torch.backends.cudnn.deterministic = deterministic
torch.backends.cudnn.benchmark = not deterministic
# torch.use_deterministic_algorithms(deterministic)
def cast(model, fp16=True):
# if fp16:
# model.half()
return model
########################################################################
# model
def create_model(ckpt, fp16=False):
# if fp16:
# return CodeGenForCausalLM.from_pretrained(ckpt, revision='float16', torch_dtype=torch.float16, low_cpu_mem_usage=True)
# else:
return CodeGenForCausalLM.from_pretrained(ckpt)
def create_tokenizer():
t = GPT2TokenizerFast.from_pretrained('gpt2')
t.max_model_input_sizes['gpt2'] = 1e20
return t
def include_whitespace(t, n_min=2, n_max=20, as_special_tokens=False):
t.add_tokens([' ' * n for n in reversed(range(n_min, n_max))], special_tokens=as_special_tokens)
return t
def include_tabs(t, n_min=2, n_max=20, as_special_tokens=False):
t.add_tokens(['\\t' * n for n in reversed(range(n_min, n_max))], special_tokens=as_special_tokens)
return t
def create_custom_gpt2_tokenizer():
t = create_tokenizer()
t = include_whitespace(t=t, n_min=2, n_max=32, as_special_tokens=False)
t = include_tabs(t=t, n_min=2, n_max=10, as_special_tokens=False)
return t
########################################################################
# sample
MAX_LENGTH_SAMPLE = 512
def sample(
model,
tokenizer,
context,
pad_token_id,
num_return_sequences=1,
temp=0.2,
top_p=0.95,
max_length_sample=MAX_LENGTH_SAMPLE,
max_length=2048
):
input_ids = tokenizer(
context,
truncation=True,
padding=True,
max_length=max_length,
return_tensors='pt',
).input_ids
input_ids_len = input_ids.shape[1]
assert input_ids_len < max_length
with torch.no_grad():
input_ids = input_ids.to()
tokens = model.generate(
input_ids,
do_sample=True,
num_return_sequences=num_return_sequences,
temperature=temp,
max_length=input_ids_len + max_length_sample,
top_p=top_p,
pad_token_id=pad_token_id,
use_cache=True,
)
text = tokenizer.batch_decode(tokens[:, input_ids_len:, ...])
return text
def truncate(completion):
def find_re(string, pattern, start_pos):
m = pattern.search(string, start_pos)
return m.start() if m else -1
terminals = [
re.compile(r, re.MULTILINE)
for r in
[
'^#',
re.escape('<|endoftext|>'),
"^'''",
'^"""',
'\\n\\n\\n'
]
]
prints = list(re.finditer('^print', completion, re.MULTILINE))
if len(prints) > 1:
completion = completion[:prints[1].start()]
defs = list(re.finditer('^def', completion, re.MULTILINE))
if len(defs) > 1:
completion = completion[:defs[1].start()]
start_pos = 0
terminals_pos = [pos for pos in [find_re(completion, terminal, start_pos) for terminal in terminals] if pos != -1]
if len(terminals_pos) > 0:
return completion[:min(terminals_pos)]
else:
return completion
class AIXCode:
def __init__(self, model_name):
# preamble
set_env()
set_seed(42, deterministic=True)
ckpt = f'/Users/bytedance/githubcode/CodeGen/checkpoints/model_name'
# load
with print_time(f'model_name loading parameters'):
model = create_model(ckpt=ckpt, fp16=False).to()
with print_time(f'model_name loading tokenizer'):
tokenizer = create_custom_gpt2_tokenizer()
tokenizer.padding_side = 'left'
tokenizer.pad_token = 50256
self.model = model
self.tokenizer = tokenizer
def aixcode(self, context_string):
# sample
with print_time(f'context_string ... AIXCoding >>>'):
completion = sample(model=self.model,
tokenizer=self.tokenizer,
context=context_string,
pad_token_id=50256,
num_return_sequences=1,
temp=0.2,
top_p=0.95,
max_length_sample=MAX_LENGTH_SAMPLE)[0]
truncation = truncate(completion)
return context_string + truncation
参考文档：https://blog.csdn.net/rensihui/article/details/80474706
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