raaghulr

deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

raaghulr

# Upsert function for pandas to_sql with postgres
# https://stackoverflow.com/questions/1109061/insert-on-duplicate-update-in-postgresql/8702291#8702291
# https://www.postgresql.org/docs/devel/sql-insert.html#SQL-ON-CONFLICT
import pandas as pd
import sqlalchemy
import uuid
import os


def upsert_df(df: pd.DataFrame, table_name: str, engine: sqlalchemy.engine.Engine):

raaghulr

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo

raaghulr

# turn off all wsl instances such as docker-desktop
wsl --shutdownnotepad "$env:USERPROFILE/.wslconfig"

[wsl2]
memory=3GB   # Limits VM memory in WSL 2 up to 3GB
processors=4 # Makes the WSL 2 VM use two virtual processors

#credits: https://itnext.io/wsl2-tips-limit-cpu-memory-when-using-docker-c022535faf6f

raaghulr

import pandas as pd
import pandas.io.sql as sqlio
import psycopg2

conn = psycopg2.connect("host='{}' port={} dbname='{}' user={} password={}".format(host, port, dbname, username, pwd))
sql = "select count(*) from table;"
dat = sqlio.read_sql_query(sql, conn)
conn = None

raaghulr

# License: Apache-2.0
# Copyright: Florian Kromer 2020

from smb.SMBConnection import SMBConnection
from typing import List, Union
from smb.base import SharedDevice, SharedFile
from tempfile import NamedTemporaryFile


class NasServerClient:

raaghulr

################## Ticks to candles in kiteconnect python ####################
# Author : Arun B
# Reference  : http://ezeetrading.in/Articles/Candles_formation_from_tick_data_zerodha.html
# Purpose : Convert ticks to candles by putting ticks in a queue. This redues time wasted in on_ticks function
################################################################################

from kiteconnect import KiteTicker
import datetime
from copy import copy
import queue

raaghulr

curl --include \
     --no-buffer \
     --header "Connection: Upgrade" \
     --header "Upgrade: websocket" \
     --header "Host: example.com:80" \
     --header "Origin: http://example.com:80" \
     --header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
     --header "Sec-WebSocket-Version: 13" \
     http://example.com:80/

raaghulr

how to leverage oracle's temping offers

free tier limits

The limits of the free tier say that you can create up to 4 instances.

• x2 x86 instances (2core/1g)
• x2 ampere instances (with 4core/24g spread between them)
• 200GB total boot volume space across all intances (minimum of 50G per instance)

create your account

raaghulr

import os
import asyncio
import aiohttp  # pip install aiohttp
import aiofiles  # pip install aiofiles

REPORTS_FOLDER = "reports"
FILES_PATH = os.path.join(REPORTS_FOLDER, "files")


def download_files_from_report(urls):