Tech
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Linux, OpenSource, Programming And Hacks

Apr 8, 2017

How to Add / Append items to a list in Python

Apr 8, 2017
To add items to a list in python is a very general task that you might come across.

Here we have an empty list that we are populating with 10 items using the append method.

n = 10

list = []

for i in range(n):
    list.append(input())

print list

That's it!

Common Mistake

its a common mistake of doing something like this

n=10
list=[]

for i in range(n):
    list[i]=input()

this will throw an error IndexError: list assignment index out of range

Because the list is empty and list[i] is trying to access index which does not exist!


Set Permissions to add files to /var/www folder in ubuntu linux


/var/www is the default root folder of your local web server (like apache), you host all your website files here and access it on the browser with url like http://127.0.0.1 or http://localhost

you cannot simply copy paste stuff in this folder using your file browser, It is protected for security reasons, you will get a permission denied error message because by default you don't have write access permission here.


Follow these Steps:

execute these commands to set all permissions for /var/www directory


sudo adduser <username> www-data
sudo chown -R www-data:www-data /var/www
sudo chmod -R g+rwX /var/www
replace <username> with your actual username.

Now you can copy, edit and create files in /var/www folder just like any other folder.


Jan 29, 2017

How to install python-gst (pygst) in ubuntu 16.04

Jan 29, 2017
pygst is the python binding of Gstreamer which is a media-framework, it supports various media handling such as audio playback, video playback and editing.

Installation

open up the terminal and enter the following commands

sudo apt-get update
sudo apt-get install python-gst-1.0

Check if its working properly

open up your python shell and import pygst

aman@vostro:~$ python
Python 2.7.11+ (default, Apr 17 2016, 14:00:29) 
[GCC 5.3.1 20160413] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pygst
>>> 

if its not installed properly then an error message will be shown: ImportError: No module named pygst


Dec 10, 2016

Syntax Highlighting with Google code-prettify and bootstrap

Dec 10, 2016
Google Code Prettify automatically detects your source code and highlights it accordingly. It's quite simple to setup.



Nov 21, 2016

Python Program for Binary Search with explanation

Nov 21, 2016
Binary search algorithm is used to find a number in a sorted list. so, the pre condition for binary search is that the list should be sorted. If the number is found then its index is returned.
This algorithm works on divide and conquer principle.



Nov 14, 2016

How to style Django Forms with Bootstrap

Nov 14, 2016
Though we can use third-party packages like Django-Crispy forms to style forms in django with ease but still it's sometimes required to style django generated forms all by yourself, here we will see how to do that. the form will be able to show errors also.


Nov 8, 2016

Connect Filezilla with Amazon EC2 Ubuntu Server

Nov 8, 2016
In this quick guide we will learn how to connect to your amazon aws ec2 ubuntu server using a FTP client like Filezilla.

1. first make sure filezilla is installed
sudo apt-get install filezilla



Nov 5, 2016

Make all Images responsive with bootstrap automatically!

Nov 5, 2016

Hi guys, in this post we will see how to make all images on your website responsive automatically with bootstrap. this will get rid of the problem of the images breaking out of the content area of your website on any kind of display.

I have written a simple script that will apply the img-responsive bootstrap class to all your images.



Oct 31, 2016

Install JavaScript & CSS Minifier in Sublime text 3

Oct 31, 2016

This is a short guide on how to install Javascript & CSS Minifier, called Sublime-Minifier. This minifier works for both sublime text 2 and 3 and supports all platforms -  Linux, Mac OS & Windows.



Oct 25, 2016

How to install & use TeamViewer on ubuntu 16.04

Oct 25, 2016
Teamviewer is a desktop sharing and remote control application, users can remotely control the desktop of the connected computer.

Follow these steps to install it on Ubuntu Linux.



Oct 19, 2016

How to Install and use Django Crispy Forms

Oct 19, 2016
Crispy forms is a third party django app that makes styling forms really simple. It makes your forms look beautiful with almost no effort from your side. It supports different template packs like uni-form, foundation, bootstrap and bootstrap3 , that's what we will be using.

Setting it up is simple as well with these few steps that I have shown below



Oct 10, 2016

Simple Hello World page with django 1.9 in Ubuntu / Linux Mint [Beginners] [Part - 2]

Oct 10, 2016
In the First part of this tutorial we created an app named helloworld and added it to the setting.py file. Now let's continue further towads our journey to make a 'Hello World' page with django.



Oct 6, 2016

Simple Hello World page with django 1.9 in Ubuntu / Linux Mint [Beginners] [Part - 1]

Oct 6, 2016
Django is a web framework written in python. It is good for fast web application development. In this tutorial we will learn how to make a simple web page showing "Hello World" using django templates. we will also be applying styling to our page with css static files, we won't be dealing with any database or any advanced stuffs here.

This tutorial is aimed at beginners, So I 'll try to explain things in simple language without much technical detail.



Oct 5, 2016

How to Install wysiwyg editor in your django project

Oct 5, 2016

with django-wysiwyg, you get different rich html text editors, making it easier to write article posts.
It supports TinyMCE, CKEditor, Redactor, Froala, yui and more

Follow the below steps to setup django-wysiwyg in your django project.



Oct 2, 2016

How to Write, Compile and Run a C/C++ Program in Fedora Terminal

Oct 2, 2016

In this tutorial we will see how to how to write, compile and run a C or C++ program in fedora terminal itself i.e writing, compiling and execution of the program will be done within the terminal itself.

For writing any program we need a console (terminal) based text editor. I 'll be using vim editor, there are many more like nano, jed, emacs...