使用-OO标志运行uvicorn

Question

当我通过$ uvicorn example:app或$ gunicorn -w 4 -k uvicorn.workers.UvicornWorker从命令行运行uvicorn服务器时，如何将优化标志-OO传递给Python解释器？任何帮助都将不胜感激！

Answer 1

例如，我们有以下应用程序：

from fastapi import FastAPI

app = FastAPI()


@app.on_event('startup')
async def startup_event():
    print('__debug__', __debug__)

独角兽可以这样运行：

$ python -O -m uvicorn example:app
INFO:     Started server process [49759]
INFO:     Waiting for application startup.
__debug__ False
INFO:     Application startup complete.
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

持枪人与：

$ python -O -m gunicorn --workers 4 --worker-class uvicorn.workers.UvicornWorker example:app
[2022-02-13 15:17:39 +0300] [49801] [INFO] Starting gunicorn 20.1.0
[2022-02-13 15:17:39 +0300] [49801] [INFO] Listening at: http://127.0.0.1:8000 (49801)
[2022-02-13 15:17:39 +0300] [49801] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2022-02-13 15:17:39 +0300] [49802] [INFO] Booting worker with pid: 49802
[2022-02-13 15:17:39 +0300] [49802] [INFO] Started server process [49802]
[2022-02-13 15:17:39 +0300] [49802] [INFO] Waiting for application startup.
__debug__ False
[2022-02-13 15:17:39 +0300] [49802] [INFO] Application startup complete.
[2022-02-13 15:17:39 +0300] [49804] [INFO] Booting worker with pid: 49804
[2022-02-13 15:17:39 +0300] [49805] [INFO] Booting worker with pid: 49805
[2022-02-13 15:17:39 +0300] [49804] [INFO] Started server process [49804]
[2022-02-13 15:17:39 +0300] [49804] [INFO] Waiting for application startup.
__debug__ False
[2022-02-13 15:17:39 +0300] [49804] [INFO] Application startup complete.
[2022-02-13 15:17:39 +0300] [49805] [INFO] Started server process [49805]
[2022-02-13 15:17:39 +0300] [49805] [INFO] Waiting for application startup.
__debug__ False
[2022-02-13 15:17:39 +0300] [49805] [INFO] Application startup complete.
[2022-02-13 15:17:39 +0300] [49806] [INFO] Booting worker with pid: 49806
[2022-02-13 15:17:39 +0300] [49806] [INFO] Started server process [49806]
[2022-02-13 15:17:39 +0300] [49806] [INFO] Waiting for application startup.
__debug__ False
[2022-02-13 15:17:39 +0300] [49806] [INFO] Application startup complete.

Answer 2

您可能需要以编程方式运行uvicorn，然后使用-O运行代码。

# main.py
import uvicorn

class App:
   ...

app = App()

if __name__ == "__main__":
    uvicorn.run("main:app", host="127.0.0.1", port=5000)

然后用python -O main.py运行它

验证代码是否实际使用-O标志运行的一种方法是使用断言。断言语句从优化的代码中删除，因此您可以在main.py中的某个地方添加这段代码。

try:
    assert False
except AssertionError:
    print("Warning: code is not optimized")
else:
    print("Running optimized code")