aiosqlite | asyncio bridge to the standard sqlite3 module | Reactive Programming library
kandi X-RAY | aiosqlite Summary
kandi X-RAY | aiosqlite Summary
asyncio bridge to the standard sqlite3 module
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Top functions reviewed by kandi - BETA
- Start the thread
- Get the event loop
- Execute the given SQL query
- Wrapper for _execute
- Create a new cursor
- Execute a sql statement
- Execute an INSERT statement
- Execute a function asynchronously
- Returns a Cursor object
- Fetch one row from the cursor
- Execute a sql query and return the result
- Fetch all rows
- Execute a script script
- Roll back the transaction
aiosqlite Key Features
aiosqlite Examples and Code Snippets
Lines of Code : 24License : Strong Copyleft (CC BY-SA 4.0)
Copycursor = await main.execute(...)
async def get_balance(ctx, user : discord.Member): # PEP8: readable names
main = await aiosqlite.connect('main.db')
cursor = await main.execute(f"SELECT balance FROM Maiclass EternalAsynchronousDatabase(Thread):
"""
The asynchronous thread.
"""
def run(self):
loop = new_event_loop()
loop.run_until_complete(self._run())
loop.close()
async def _run(self):
SELECT BALANCE FROM users WHERE user_name = @toppythonguy
await sql_cursor.execute(f”SELECT balance FROM users WHERE {column} = ?”, userid)
1; DELETE FROM users
SQLite objects created in a thread can only be used in that same thread. The object was created in thread id 10688 and this is thread id 17964
result = await conn.execute("select kw from all_data order by kw desc limit 1")
resultfetch = await result.fetchone()
print(resultfetch[0])
select kw from all_data order by kw desc limit 1;
import aiosqlite
async def aio_db_stuff():
db = await aiosqlite.connect("db.db")
cursor = await db.execute('SELECT * FROM Users')
row = await cursor.fetchone()
rows = await cursor.fetchall()
await cursor.close()
await db cursor = await router.db_connection.execute(
"SELECT CustomerId FROM customers WHERE CustomerId = ?", (customer_id, )
)
customer_id = await cursor.fetchone()
if not customer_id:
response.status_code = statusasync def main():
async with aiosqlite.connect(...) as conn:
# save conn somewhere
await run_loop()
try:
conn = aiosqlite.connect(...)
await conn.__aenter__()
# do stuff
finally:
async def fetchall_async(conn, query):
loop = asyncio.get_event_loop()
return await loop.run_in_executor(
None, lambda: conn.cursor().execute(query).fetchall())
async def some_task():
...
stCommunity Discussions
Trending Discussions on aiosqlite
QUESTION
How do I keep my database that I created with the AIOSQLite library open for my DiscordPY bot so that I don't have to keep on creating new connections and closing them on every command and event that I create?
...ANSWER
Answered 2021-May-30 at 11:30Upon further research, I have found out that creating an asynchronous thread which keeps on making the database connection global can keep the database always open. I have also found out that closing the database is not necessary, but can be done as the asynchronous thread will keep on opening it and so will open it afterwards.
QUESTION
I'm writing telegram bot in python with sqlite as database. I use aiosqlite as framework for connecting to database and executing values. In database I have 3 columns and it looks like:
...ANSWER
Answered 2021-Apr-05 at 12:08The problem is that you’re using an f-string to construct your SQL statement. When you try to use user_name you end up with
QUESTION
The example I will describe here is purely conceptual so I'm not interested in solving this actual problem.
What I need to accomplish is to be able to asynchronously run a function based on a continuous output of a subprocess command, in this case, the windows ping yahoo.com -t command and based on the time value from the replies I want to trigger the startme function. Now inside this function, there will be some more processing done, including some database and/or network-related calls so basically I/O processing.
My best bet would be that I should use Threading but for some reason, I can't get this to work as intended. Here is what I have tried so far:
First of all I tried the old way of using Threads like this:
...ANSWER
Answered 2021-Mar-19 at 08:36The first code wasn't working as I did a stupid mistake when creating the thread so p1 = threading.Thread(target=startme(mytime)) does not take the function with its arguments but separately like this p1 = threading.Thread(target=startme, args=(mytime,))
The reason why I could not get the SQL insert statement to work in my second code was this error:
QUESTION
Could anyone give me a tip with asyncio SQLite on how to retrieve the last value from a column named kW? Only column in the db named save_data with one table named all_data.
In SQLite db browser if I run SELECT * FROM all_data ORDER BY kW DESC LIMIT 1; this will return:
2021-02-01 09:23:09.758140 73.7699966430664
Which is correct but includes the timestamp but I am only interested in the value 73.7699966430664
Any tips help not an expert on sql and trying to learn asyncio at the same time. The code below doesn't require asyncio but its part of something else I am working on...
...ANSWER
Answered 2021-Feb-01 at 18:39try to fetch your object:
QUESTION
I have looked at the other posts about this issue and didnt find any working solutions. My bot is currently undergoing a development overhaul and I'm moving a lot of my stored data (mod mail bot) into a aiosqlite db. In doing so I have come across this issue.
...ANSWER
Answered 2020-Nov-30 at 06:30My code was completely correct my token was however invalidated by discord and redoing my token fixed it
QUESTION
There is documentation for the library. I am using the code from there:
...ANSWER
Answered 2020-Nov-19 at 01:37You need to put your await statements inside a coroutine:
QUESTION
So I'm trying to make an on_user_update event and to send the message I need to fetch the channel_id that is set as the log channel for the guild, which I sort by guild_id, but on_user_update has no guild attribute. So how would I achieve my goal?
Here's the code:
...ANSWER
Answered 2020-Aug-20 at 04:29When you call on_member_update before and after are Member Objects, this means that you can simply do this.
QUESTION
I'm trying to asynchronously process multiple files, and processing each file requires some reads and writes to an SQLite database. I've been looking at some options, and I found the aiosqlite module here. However, I was reading the SQLite documentation here, and it says that it supports multi-threaded mode. In fact, the default mode is "serialized" which means it "can be safely used by multiple threads with no restriction."
I don't understand what the difference is. The aiosqlite documentation says:
aiosqlite allows interaction with SQLite databases on the main AsyncIO event loop without blocking execution of other coroutines while waiting for queries or data fetches. It does this by using a single, shared thread per connection.
I get that there is a difference between aiosqlite and the "multi-threaded" mode on sqlite because the multi-threaded mode requires only one connection per thread, whereas in aiosqlite, you can reuse this single connection across multiple threads. But isn't this the same as serialized mode where it can be "used by multiple threads with no restriction"?
Edit: My question right now is "Is my current understanding below is correct?":
- Sqlite in "serialized" mode can be used by multiple threads at one time, so this would be used if I used the
threadingmodule in python and spawned multiple threads. Here I have the options of either using a separate connection per thread or sharing the connection across multiple threads. - aiosqlite is used with asyncio. So since asyncio has multiple coroutines that share one thread, aiosqlite also works with one thread. So I create one connection that I share among all the coroutines.
- Since aiosqlite is basically a wrapper for sqlite, I can combine the functionality of 1 and 2. So I can have multiple threads where each thread has an asyncio event loop with multiple coroutines. So the basic sqlite functionality will handle the multi-threading and the aiosqlite will handle the coroutines.
ANSWER
Answered 2020-Sep-17 at 11:04First of all about threads:
Sqlite ... can be used by multiple threads at one time
It will still be not the same time because of GIL, Threads are always running concurrently (not in parallel). The only thing that with GIL you don't know when thread will be interrupted. But asyncio allows you to switch between threads "manually" and on waiting for some IO operations (like database communication).
Let me explain differences between different modes:
- Single-thread - creates single database connection without any mutexes or any other mechanisms to prevent multi-threading issues.
- Multi-thread - creates single shared database connection with mutexes that locks that connection for each operation/communication with database.
- Serialized - creates multiple database connections per thread.
Answering questions in update:
Yes
Sqlite in "serialized" mode can be used by multiple threads at one time, so this would be used if I used the threading module in python and spawned multiple threads. Here I have the options of either using a separate connection per thread or sharing the connection across multiple threads.
Yes, it will share a single connection between them.
aiosqlite is used with asyncio. So since asyncio has multiple coroutines that share one thread, aiosqlite also works with one thread. So I create one connection that I share among all the coroutines
Yes.
Since aiosqlite is basically a wrapper for sqlite, I can combine the functionality of 1 and 2. So I can have multiple threads where each thread has an asyncio event loop with multiple coroutines. So the basic sqlite functionality will handle the multi-threading and the aiosqlite will handle the coroutines.
QUESTION
I am attempting to add the previous value of a column to another string but I fear because it is null.
...ANSWER
Answered 2019-Nov-01 at 12:14Use COALESCE():
QUESTION
For example i have some sql query:
...ANSWER
Answered 2019-Jul-30 at 18:51Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install aiosqlite
You can use aiosqlite 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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