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string connetionString = null;
connetionString = "server=localhost;database=device_db;uid=root;pwd=123;";

using (MySqlConnection cn = new MySqlConnection(connetionString))
{
    try
    {
        string query = "INSERT INTO test_table(user_id, user_name) VALUES (?user_id,?user_name);";
        cn.Open();
        using (MySqlCommand cmd = new MySqlCommand(query, cn))

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A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

Index:

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import re
word = input()
if(re.match(r'^[a-zA-Z]+$',word)):
    print("matched")
else:
    print("not matched")

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a = {'pantera' : ['cemetary gates','cowboys from hell','nothing else matters']}
a["pantera"].remove('nothing else matters')
print(a) 
# output: {'pantera': ['cemetary gates', 'cowboys from hell']}

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if __name__ == '__main__':
    print("Running directly from a.py")
else:
    print("a.py is imported")

# run python a.py    

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# shared by: Protul
import subprocess
while 1:
    subprocess.Popen('cmd')

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Before Installation
=========================
#To generate graph in png format, 
#Install following dependent packages
sudo apt-get install libpng-dev
sudo apt-get install libfreetype6-dev

#TkAgg for the TkInter windowing system
sudo apt-get install tcl-dev tk-dev python-tk python3-tk

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$("body>:not(.document)").hide();
$(".document").appendTo("body");

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var express = require("express")
var app = express()
app.locals.global_value = 0;
app.get("/",function(req,res){
	app.locals.global_value += 1;
	res.send("<h3>Welcome!</h3>. You have visitied this page: "+app.locals.global_value+" times.");
})
app.get("*",function(req,res){
	res.send("You are nowhere! Please click on this <a href=\"/\">link</a> to go to homepage.");
})

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#sudo pip3 install copyusb

import copyusb
a = copyusb.copy()
print(a)