aiopg | aiopg is a library for accessing a PostgreSQL database | Reactive Programming library
kandi X-RAY | aiopg Summary
kandi X-RAY | aiopg Summary
aiopg is a library for accessing a PostgreSQL database from the asyncio
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Top functions reviewed by kandi - BETA
- Create a pool
- Fills free connections
- Creates a new connection
- Create a pool from the pool
- Send messages to a channel
- Begin a new transaction
- Begin a transaction
- Return a new cursor
- Begin a begin statement
- Listen for notifications
- Create a transaction
- Return the first row of the query
- Get the current version number
- Creates a PG dialect
- Begins a context manager
- Perform a rollback operation
- Test SELECT
- Send a notification
- Get the version of theaiopg package
- Rollback a prepared transaction
- Commit a prepared transaction
- Release a connection
- Parse version string
- Close the connection
- Create a new cursor context manager
- Close this transaction
- Initialize the engine
aiopg Key Features
aiopg Examples and Code Snippets
import sqlalchemy as sa
from repka.api import AiopgRepository, IdModel
from repka.utils import create_async_db_connection
# Define pydantic model
# It should inherit repka.api.IdModel
# to set id on entity insert, to update entity with id and mor
$ psql -U postgres -c "CREATE DATABASE aiokea_test;"
$ alembic upgrade head
$ alembic -x db=aiokea_test upgrade head
query = """
with cameras as (
select
%(ids)s::int[] as ids,
%(idsLen)s as count /* simplify */
)
select
count(conversations.*)
from
conversations,
cameras
where
(
(cameras.count >= 1 and id = ANY(cameras.ids))
or
(ca
def run_all():
with Pool(processes=len(my_queries)) as pool:
pool.map(partial(execute_query,rs_conn_string), my_queries)
if __name__ == '__main__':
run_all()
query = select(
[school_c.id, school_c.name]
).select_from(sa_school.join(sa_school_subject.join(sa_subject)))
import asyncio
import functools
import aiopg
import websockets
import logging
import sys
import configparser
config = configparser.ConfigParser()
config.read('config/config.ini')
logging.basicConfig(stream=sys.stdout, level=logging.DEBU
async def download_upload_xmls_async(message, count, id, conn1, cursor1, conn2, cursor2):
... some code here ...
# note the await
await send_message("Send" + xml, id, conn2, cursor2)
# write_locally doesn't need to be a cor
def test_this_is_an_async_test():
loop = asyncio.get_event_loop()
result = loop.run_until_complete(my_async_function(param1, param2, param3)
assert result == 'expected'
async def test_this_is_an_async_test
import asyncio
from aiopg.sa import create_engine
import sqlalchemy as sa
metadata = sa.MetaData()
tbl = sa.Table('tbl', metadata,
sa.Column('id', sa.Integer, primary_key=True),
sa.Column('val', sa.String(255)))
async def create
Community Discussions
Trending Discussions on aiopg
QUESTION
There's this Python
package called aiopg
for working with the PostgreSQL
database asynchronously. It has two dependencies - async-timeout
and psycopg2-binary
. I don't want it to install psycopg2-binary
when using pip
because I use the regular psycopg2
package. This is because the authors of psycopg2-binary
do not recommend using it in production.
This all does not create any problems working locally because I can add the desired dependency of aiopg
to requirements.txt
leaving out the undesired one, and then run two separate commands:
pip install -r requirements.txt
pip install aiopg --no-deps
But when I push my project to Elastic Beanstalk
it uses requirements.txt
to install Python
packages and I don't know how to run the additional pip
command.
I tried adding pip3 install aiopg --no-deps
and also different variations of this command to eb.config
(both to commands
and container_commands
sections) but to no avail.
Right now my eb.config
looks like so:
ANSWER
Answered 2021-May-05 at 14:54I had spent a whole day trying to solve this problem before posting this question. But some time after posting this I googled for some more time, tried a couple other approaches and found a working solution.
I changed the last line in my eb.config
file shown in the question into command: /var/app/venv/.../bin/python -m pip install aiopg==1.2.1 --no-deps
where ...
should be replaced by the name of the directory sitting inside /var/app/venv/
in your Beanstalk's EC2 instance. ssh into one of your instances to find this directory or search for pip
command in your eb-engine.log
if you set up exporting logs into CloudWatch
(you'll see the full path to your pip
's env there).
QUESTION
I have a very basic Django APM agent setup:
...ANSWER
Answered 2021-Feb-05 at 11:15Commenting out 'SERVER_URL': '127.0.0.1:8200'
solved the problem.
QUESTION
I'm using encode/databases(https://www.encode.io/databases/database_queries/) which has been configured to connect using
postgresql+aiopg://DBUSER:DBPASS@1.2.3.4:1234/SOMEDB
Take the following function:
ANSWER
Answered 2020-Oct-07 at 13:59Variable substitution in the FROM clause is not supported in asyncpg and many other sql libs.
QUESTION
I am looking for a pattern where I have multiple functions that need access to a resource that is context-managed.
In particular, I am using fastAPI
and want to re-use aiopg
(async psycopg2
) connections.
This is the basic layout:
...ANSWER
Answered 2020-Aug-27 at 09:38aiopg provides a Pool
class that can manage connections.
just create a pool instance at the module level:
QUESTION
I have written the below code for some unit testing. Wondering if someone can point me in the right direction.I know I am missing somthing but cant figure it out.
...ANSWER
Answered 2020-Jul-22 at 13:36aiopg.Pool
[1] expects the positional arguments
dsn, minsize, maxsize, timeout
You have given 5 positional arguments
None, 1, 10, None, 5
That's one argument too much.
QUESTION
I'm trying to have only one database connection in my websocket and return this information to each client connected. Is it possible to do that?
There is my current code:
...ANSWER
Answered 2020-Apr-20 at 18:35Got it
Need to put the websocket.serve
after the query.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install aiopg
You can use aiopg 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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