我正在研究 FastAPI 并发生了这个错误。
from fastapi import FastAPI
import uvicorn
app = FastAPI()
@app.get("/ping")
async def ping():
return "Hello, I am alive"
if __name__ == "__main__":
uvicorn.run(app, host='localhost', port=8000)
Traceback (most recent call last):
File "D:/own_thesis/training/for_api.py", line 2, in <module>
from fastapi import FastAPI
File "C:\Users\USER\AppData\Local\Programs\Python\Python37\lib\site-packages\fastapi\__init__.py", line 7, in <module>
from .applications import FastAPI as FastAPI
File "C:\Users\USER\AppData\Local\Programs\Python\Python37\lib\site-packages\fastapi\applications.py", line 15, in <module>
from fastapi import routing
File "C:\Users\USER\AppData\Local\Programs\Python\Python37\lib\site-packages\fastapi\routing.py", line 22, in <module>
from fastapi.datastructures import Default, DefaultPlaceholder
File "C:\Users\USER\AppData\Local\Programs\Python\Python37\lib\site-packages\fastapi\datastructures.py", line 3, …fastapi ×1