aiofiles | File support for asyncio | Reactive Programming library
kandi X-RAY | aiofiles Summary
kandi X-RAY | aiofiles Summary
File support for asyncio
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Top functions reviewed by kandi - BETA
- Creates a temporary file context manager
- Create a temporary file
- Wrap a function in an event loop
- Creates a builder for the given attributes
- Create a coroutine method for the given attribute
- Creates a class proxy method
- Creates a proxy method for the given attribute name
- Creates a class proxy for the given attributes
- Make a proxy property
- Creates a condition builder
- Creates a method that returns the decorated method
- Create a temporary directory manager
- Create a temporary directory
- Create a temporary file context manager
aiofiles Key Features
aiofiles Examples and Code Snippets
Lines of Code : 141
License : No License
Copydef find_data(self, col="infoq_seed"):
# 获取状态为0的数据
data = self.db[col].find({"status": 0})
gen = (item for item in data)
return gen
async def run(data):
crawler.info("Start Spider")
async with aiohttp.connecto import asyncio
import csv
import aiofiles
from aiocsv import AsyncReader, AsyncDictReader, AsyncWriter, AsyncDictWriter
async def main():
# simple reading
async with aiofiles.open("some_file.csv", mode="r", encoding="utf-8", newline="") as echo $XDG_SESSION_TYPE
import aiofiles
@app.post("/upload")
async def upload(file: UploadFile = File(...)):
async with aiofiles.open(file.filename, 'wb') as f:
while content := await file.read(1024): # async read chunk
await f.write(contetheobj = asyncio.run(App().main())
theobj()
async def save_image(path: str, image: memoryview) -> None:
async with aiofiles.open(path, "wb") as file:
await file.write(image)
image = Image.open(...)
buffer = BytesIO()
image.save(buffer, format="JPEG")
await save_ima async with aiofiles.tempfile.NamedTemporaryFile("wb", delete=False) as file:
import subprocess
import asyncio
from dataclasses import dataclass
import shlex
import aiofiles
import os
import logging
import imghdr
import asyncio
async def read_files():
async with aiofiles.open('/tmp/test/abc_20211105.txt','r') as f:
await f.read()
asyncio.run(read_files())
import json
import datetime
import aiofiles
async def main():
def mk_record(index):
# simulate some JSON content that I want to write to a file
return {
'index': index,
'message': f"Message {indimport json
# reading
def get_bank_data(server_name):
with open("bank.json", "r") as f:
database = json.load(f)
users = database.get(server_name, {})
return users
# writing
def put_bank_data(server_name, users):
Community Discussions
Trending Discussions on aiofiles
QUESTION
I try to use library cv2 for changing picture. In mode debug I found out that problem in function cv2.namedWindow:
...ANSWER
Answered 2021-Nov-07 at 00:17I reverted back to Xorg from wayland and its working, no more warnings
Here are the steps:
- Disbled Wayland by uncommenting
WaylandEnable=falsein the/etc/gdm3/custom.conf - Add
QT_QPA_PLATFORM=xcbin/etc/environment - Check whether you are on Wayland or Xorg using:
QUESTION
I have a simple python async program that retrieves a gzipped file from a particular URL. I have used the aiohttp for async requests. As per the aiohttp docs (https://docs.aiohttp.org/en/stable/client_quickstart.html), I have used their example under 'Streaming Response Content' in my test method to write the data.
...ANSWER
Answered 2022-Mar-01 at 06:53Good question. Look at the following little program, which runs two tasks. Each has an async context manager and an async iterator:
QUESTION
I'm uploading zip files as UploadFile via FastAPI and want to save them to the filesystem using async aiofiles like so:
...ANSWER
Answered 2022-Feb-09 at 22:07Use as below (source):
QUESTION
I´m developing a simple reactive programming script example to download images from a web, but when I execute the script in VScode I do not get any type of output, I already tried creating a VirtualEnv
In the terminal i get this output:
CODE: ...PS C:\Users\ernes\Desktop\paradigmas> & C:/Users/ernes/AppData/Local/Programs/Python/Python38/python.exe c:/Users/ernes/Desktop/paradigmas/jose.py PS C:\Users\ernes\Desktop\paradigmas>
ANSWER
Answered 2021-Dec-14 at 16:07Add this to the bottom, outside of the class
QUESTION
For asynchronous file saving, I can use aiofiles library.
To use aiofiles library I'd have to do something like that:
ANSWER
Answered 2021-Dec-10 at 18:04Thanks to the comment posted by @MarkSetchell I managed to find the solution.
QUESTION
I have the following method to create a dummy video file:
...ANSWER
Answered 2021-Nov-09 at 23:28It looks like you have to make sure the data is written to the temporary file, before executing FFmpeg.
I don't have any experience with asyncio and aiofiles and I am running Windows 10, so I am not sure about the Linux behavior...
I tried to add await file.flush() after file.write(data), but the FFmpeg execution result was "Permission denied".
I solved it using the solution from the following post:
Add
delete=Falseargument totempfile.NamedTemporaryFile:
QUESTION
Simple Problem statement. I want to read files asynchronously . My problem is when I try to read a file using aiofiles.open it just errors out with the cryptic messsage
...ANSWER
Answered 2021-Nov-06 at 00:13The aiofiles.open context manager is meant to be used asynchronously (async with), in a coroutine. Standard synchronous context managers rely on __enter__ and __exit__ methods, while async context managers use methods named __aenter__ and __aexit__, thus, async with is necessary to call the __aenter__ and __aexit__ methods of aiofiles.open, instead of __enter__ and __exit__ (which are not defined for aiofiles.open):
QUESTION
ANSWER
Answered 2021-Oct-06 at 00:20When you docker run the image, you'll note the following output:
QUESTION
I have a question I'm new to the python async world and I write some code to test the power of asyncio, I create 10 files with random content, named file1.txt, file2.txt, ..., file10.txt
here is my code:
...ANSWER
Answered 2021-Sep-01 at 19:55I post an issue #110 on aiofiles's GitHub and the author of aiofiles answer that:
You're not doing anything wrong. What aiofiles does is delegate the file reading operations to a thread pool. This approach is going to be slower than just reading the file directly. The benefit is that while the file is being read in a different thread, your application can do something else in the main thread.
A true, cross-platform way of reading files asynchronously is not available yet, I'm afraid :)
I hope it be helpful to anybody that has the same problem
QUESTION
I'm trying to save a bunch of gzip files from an API response in async. Basically, I'm getting an array with different URI's and I have to append these to a base URL in order to download the .gz file. In the .gz files is a text file formatted as JSON. I already have code working in a synchronous way, but I would like to try async to minimize the runtime. I have tried an async way below and this does give me .gz files, but when I try to extract these nothing is in them. Any help or ideas are much appreciated!
This is the synchronous code:
...ANSWER
Answered 2021-Aug-03 at 20:53Take a look at the asynchronous for loop, it is a built in construct in newer Python 3 versions.
See here: https://quentin.pradet.me/blog/using-asynchronous-for-loops-in-python.html
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install aiofiles
You can use aiofiles like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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