All Questions
27 questions
0
votes
1
answer
110
views
How to read async stream from non-async method? [duplicate]
I use FastAPI to create the app. One of features is upload of files with PUT request.
Fast API supports uploading files with POST requests (multipart form).
But I need the PUT request where a file is ...
- 2,045
0
votes
1
answer
96
views
Why is await queue.get() Blocking and Causing My Async Consumers to Hang?
I’m having trouble with an asynchronous queue. Specifically, the await queue.get() seems to block the rest of my application, causing it to hang.
I came across a similar issue discussed here: Why is ...
- 1,456
1
vote
1
answer
74
views
Keep a variable between two threads in python [duplicate]
I'm using python Fastapi.
I am running an application that at one point launches a job to an external service. The service then sends a webhook with the job's status, a status I receive in an endpoint ...
- 11
1
vote
1
answer
205
views
AttributeError: 'function' object has no attribute 'submit' [duplicate]
I am using fastapi and uvicorn as my python server and whenever a user visits a route, I want to start a subprocess in the background. I used asyncio.create_task and loop.run_in_excutor in order to ...
- 87
2
votes
2
answers
533
views
FastAPI TestClient not starting lifetime in test
Example code:
import os
import asyncio
from contextlib import asynccontextmanager
from fastapi import FastAPI, Request
@asynccontextmanager
async def lifespan(app: FastAPI):
print(f'Lifetime ON {...
- 7,322
0
votes
1
answer
66
views
Python asyncio + multiprocessing [duplicate]
I am trying to create a server with fastapi with multiprocessing, where you can send an image to a given endpoint, and it will be processed concurrently via 3 different ocr models to recognize text. ...
-1
votes
1
answer
265
views
Python asyncio.gather not really parallel? [duplicate]
So I am trying to understand the parallelism in asyncio.gather() function.
I have a FastAPI app that needs to upload 4 files to s3 at the same time.
I am using a local S3 for testing right now, so ...
- 164
0
votes
0
answers
174
views
FastAPI is not working like expected in Async Mode [duplicate]
I need to build an API using FastAPI with the following requirements:
Should be Async
Accepts a PDF and input
Split the pdf to images
call 3 api endpoints for each image synchronously
It should be ...
1
vote
0
answers
509
views
Validate model with sqlalchemy AsyncSession
I have a FastAPI server and a PostgresSQL database integrated using sqlalchemy. This is the dependency to get the database (I'm following sqlalchemy async best practicies):
import os
from sqlalchemy ...
- 31
5
votes
2
answers
4k
views
Call async function from sync inside async FastAPI application
Not sure, that this is possible, but still
I have default async FastAPI application, where I have sync function
@classmethod
def make_values(
cls,
records: list,
symbol: str = ...
- 2,342
3
votes
1
answer
1k
views
FastAPI async routes deadlock bug when using infinite loop [duplicate]
I am experiencing an issue with FastAPI where the application gets deadlocked when using an infinite loop in an async route. Here is a simplified version of my FastAPI application (fastapi_test.py):
...
- 41
1
vote
0
answers
52
views
How to call a route once in Fastapi and block calling it again (display a "process running" message) until execution completes
There is a need to wait for a function to be executed and to protect it from being called again. It is necessary to protect the route call from being called again; if the route is called again while ...
- 11
0
votes
1
answer
175
views
how fastapi async works? [duplicate]
I have this small fastapi application
# run_sync_8001.py
import time
import uvicorn
from fastapi import FastAPI, Query
app = FastAPI()
@app.get("/")
def sleep(n: int = Query()):
time....
- 2,465
12
votes
2
answers
19k
views
What does async actually do in FastAPI? [duplicate]
I have two scripts:
from fastapi import FastAPI
import asyncio
app = FastAPI()
@app.get("/")
async def root():
a = await asyncio.sleep(10)
return {'Hello': 'World',}
And second ...
- 913
1
vote
1
answer
940
views
Convert Blocking python function to async function [duplicate]
So currently I have 4 api requests which are called in synchronous method using a third_party lib which is synchronous. What i want is to run them in parallel. So that my total time to call all 4 apis ...
- 995