asyncpg | A fast PostgreSQL Database Client Library | Reactive Programming library
kandi X-RAY | asyncpg Summary
kandi X-RAY | asyncpg Summary
A fast PostgreSQL Database Client Library for Python/asyncio.
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Top functions reviewed by kandi - BETA
- Start the cluster
- Get connection address from pidfile
- Tries to connect to the server
- Get connection spec
- Copy records to a table
- Returns whether the connection is closed
- Prepare a prepared statement
- Retrieve a single statement
- Return the error name for a SQL statement
- Execute a command
- Find pg_config
- Fetch a query
- Reset the connection
- Create a new PostgresMessage instance
- Acquire a connection
- Copy data to a table
- Copy data from a table to a file
- Run async
- Release a pooled connection
- Copy data from a query to a file
- Create a Cursor instance
- Fetch a single row from the database
- Copy data from a query
- Copy data from a table
- Release a connection
- Copy data into a table
asyncpg Key Features
asyncpg Examples and Code Snippets
Lines of Code : 21License : Permissive (MIT)
Copyimport asyncio
import asyncpg
import asyncpg_listen
async def handle_notifications(notification: asyncpg_listen.NotificationOrTimeout) -> None:
print(f"{notification} has been received")
listener = asyncpg_listen.NotificationListener(async import asyncio
from buildpg import asyncpg
async def main():
async with asyncpg.create_pool_b('postgres://postgres@localhost:5432/db') as pool:
await pool.fetchval_b('select spam from mytable where x=:foo and y=:bar', foo=123, bar='whateve 
License : No LicenseCopyfrom postgis.asyncpg import register
pool = await create_pool(**DB_CONFIG, loop=loop, max_size=100,
init=register)
"""
Example demonstrating use with ASGI (raw ASGI application, no framework).
Requires the "postgresql" service to be running.
To install prerequisites: pip install sqlalchemy asyncpg uvicorn
To run: uvicorn asgi_noframework:app
It should print a l """
This is an example demonstrating the use of the scheduler as only an interface to the
scheduling system. This script adds or updates a single schedule and then exits. To see
the schedule acted on, you need to run the corresponding worker script ( """
Example demonstrating use of the asynchronous scheduler with persistence via PostgreSQL
in a simple asyncio app.
Requires the "postgresql" service to be running.
To install prerequisites: pip install sqlalchemy asyncpg
To run: python async_postg class Dotdict(dict):
__getattr__ = dict.get
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__
class AsyncCompositeType(CompositeType):
# async sessions return asyncpg.Record not the typecursor.execute("select set_config('iam.identity', %s, false)", (identity,))
session.add(MyModel(**body.dict()))
update_frequency_month = 'null' if update_frequency_month is None else update_frequency_month
('''
INSERT INTO company.transition_company (company_name, target_carbon..)
VALUES ($1, $2,..)
''', company, target,..)
Community Discussions
Trending Discussions on asyncpg
QUESTION
How I can get the last inserted id?
Please, pay attention on the sqlalchemy version, so this question isn't my case.
I tried:
...ANSWER
Answered 2021-Apr-24 at 07:54SQLAlchemy's support for the lastrowid depends on the underlying DB-API implementation, so it isn't safe to rely on this attribute. However SQLAlchemy provides an inserted_primary_key attribute on the CursorResult object which ought to be reliable.
The return value is a tuple of the primary key values for the inserted row.
This version of the code in the question:
QUESTION
I am working in a Java spring boot application, running as a docker container.
The main purose of this application was to execute python scripts. So inside the docker container, I had to make available python environment. I added the python runtime with this code. But seems this is very basic python verson and I can not make other important libraries available.
Like, I wanted to add 'asyncpg' library so that I can use connection pool.
But it is not letting me to add asyncpg library.
Below is the docker file.
Note: I have commented '#FROM python:3.6-alpine', if I make this open then java runtime will not be available which is 'FROM openjdk:8u191-jre-alpine3.8'
------- Docker file --------------
...ANSWER
Answered 2021-Apr-20 at 10:56I have got one solution .. that at the first line of the docker file, I will first decleare the 'FROM alpine:3.7', and then inside the docker file I will keep adding the required runtimes and the dependent libraries accordingly. This way we can add mutiple runtimes.
Below the working docker compose where I have commented out both the lines for openjdk and python runtime and added FROM alpine:3.7: Also some trick to add asyncpg library to the python runtime. This way I can now add any dependencies. I can now work on asyncpg.
-------- Docker file ----------------
QUESTION
Hi I'm moving to asyncpg from psycopg2 and I'm having an issue trying to return a number of rows in asyncpg in this case 10. In psycopg2 I would do this by the following:
psycopg2
...ANSWER
Answered 2021-Apr-18 at 18:47You can simply use the LIMIT clause
QUESTION
I am trying to install a package that is not on PyPi. i.e from github. Adding the repo as git+url to the requirements file gives
...ANSWER
Answered 2021-Apr-13 at 08:59As the error tells us, we have to simply install git, so that pip can clone the repo and run the setup file. We can install git with
QUESTION
Hi I'm getting an error that occurs when trying to add the timestamp. I keep getting the error asyncpg.exceptions.PostgresSyntaxError: syntax error at or near "18" and this line end_date = duration + dt.datetime.now(bst) # timestamp seems to be the culprit however I'm unsure why this is the case.
Here is what I'm working with:
...ANSWER
Answered 2021-Apr-12 at 21:14You don't pass the arguments in f-strings when dealing with SQL queries, the syntax for query arguments in asyncpg is $n, also I see that you're using the Connection.fetch method but you're simply updating the table, I'd suggest you to use Connection.execute
Your code fixed:
QUESTION
I have a discord.py bot that is trying to read a different entry to a postgresql table depending on what argument is given in the command. For example, if one was to do $playtime penguin then it would give the entry in minutes_played for the account 'penguin'. Here is what I have so far.
...ANSWER
Answered 2021-Mar-30 at 21:35From what I see in the documentation the arg should contain the name provided as the first argument for the command. Also make sure to use parametrized queries to avoid sql injections. The following code should work:
QUESTION
I'm trying to use Apscheduler with a postgresql db via an asyncpg connection. I thought it would working, because asyncpg supports sqlalchemy ref. But yeah, it isn't working. And to make it even worst, I don't understand the error message, so I have not even a guess what to google for.
...ANSWER
Answered 2021-Mar-30 at 18:45I think problem is in ApScheduler.
What is happening is that scheduler.start() will attempt to create the job table in your database. But since your database url is specified as +asyncpg and there is no async coroutine running (ie: async def) when ApScheduler tries to create the table. Hence the "coroutine 'connect' was never awaited" error.
After reading the ApScheduler code, I think "integrates with asyncio" is a little misleading - specifically the scheduler can run asyncio, but the JobStore itself has no provision for an asyncio database connection.
You can get it working by removing +asyncpg in the connection url used with ApScheduler.
Note it would still be possible to use async db calls within job functions with a separate asyncpg connection.
QUESTION
So I'm working on REST API using aiohttp & asyncpg. Here is my base view for handlers:
...ANSWER
Answered 2021-Mar-20 at 08:37The problem was due to incompatibility between asyncpg and its wrapper asyncpgsa. The fetch() snippet I pasted above was from asyncpg/connection.py of asyncpg v0.22, and _execute() snippet is from asyncpgsa/connection.py of asyncpgsa v0.16.5, which is now not even a valid version. Version 0.17.0 is compatible with 0.22 asyncpg and its record_class fields, and 0.16.5 is obviously outdated.
So, what I had to do is reconfiguring my requirements.txt:
QUESTION
I am writing my API using aiohttp, asycpg and asyncpgsa. I create my application:
...ANSWER
Answered 2021-Mar-18 at 11:52Your dsn is incorrect, so you can't connect to your database.
postgres://user:pass@host:port/database?option=value is the correct format. You forgot the user and the password.
Also asyncpgsa.create_pool() should be awaited, if not. You don't get the error, because you only assign a coroutine to the variable app['db']. So the connection pool is also not created.
Your second error (from site.py) is caused by not initizalising the connection pool.
More about that you can find in the documentation of asyncpg here (because asyncpgsa's connection pool is based on asyncpg's connection pool).
QUESTION
I'm going through the course Test-Driven Development with FastAPI and Docker from testdriven.io and just stucked with releasing my app to heroku (Part 2: Deployment). Everything was fine before I released the image to heroku:
...ANSWER
Answered 2021-Feb-24 at 21:53So I ran into the same issue, and after puttering around for a bit, this is how I got it to work. I 100% know there is a better way, but I just wanted to move on.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install asyncpg
You can use asyncpg 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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