Django field lookup - contains and icontains image
Django field lookup - contains and icontains

Field lookups are how we specify the conditions in the WHERE clause of an SQL. They are specified as keyword arguments for QuerySet methodslike filter(), exclude() and get(). Check if …

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How to install  and do minimum configuration of Mezzanine image
How to install and do minimum configuration of Mezzanine

This article assumes that you are familiar with installing and configuring Django. Mezzanine is a Django project athttp://mezzanine.jupo.org/.It is licensed under BSD.It can be used, modified, and redistributed commercially. There …

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PEP-8 Style Guide for Python Code and its importance in daily affairs of python developer image
PEP-8 Style Guide for Python Code and its importance in daily affairs of python developer

Pep-8 is theStyle Guide for Python Code. As many of you know, PEP is "Python Enhancement Proposals". They provide standard reference points to write code in pythonic way. PEP-8 is …

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Internet of Things (IOT) - Welcome to a smarter world image
Internet of Things (IOT) - Welcome to a smarter world

IoT or Internet of things is a network of things or objects, usually connected via wireless network like household appliances. Usually, objects connected in IoT will be self configuring. This …

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Proof of work (PoW) - add security to your block chain image
Proof of work (PoW) - add security to your block chain

Proof of Work is the method by which the legitimacy of a transaction is verified. Let us try adding proof of work to the previous block chain we created at …

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Block Chain - What is it? How can we make one? Can we make a block chain in python? image
Block Chain - What is it? How can we make one? Can we make a block chain in python?

Block chain is the buzzword in the world now. This is a demonstration of what block chain is, in Python. There is nothing fancy or the code we write can …

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Customize HTML template for Mezzazine website image
Customize HTML template for Mezzazine website

In our previous blog, we saw how to install and configure Mezzanine blog and up running. As you can see, the site had no fancy design and it is a …

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Search database with regular expression in Django image
Search database with regular expression in Django

Regex and iregex are the two field lookups that enable us to search database with regular expressions. regex is case-sensitive where as iregexis case-insensitive. The regular expression syntax is that …

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Get a file's size with C++ image
Get a file's size with C++

std:: experimental:: filesystem:: file_size (added in C++17) makes thisstraightforward. Returns the size of the regular file, determined as if by reading themember of the structure obtained by POSIX stat(symlinks are …

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Django Q objects image
Django Q objects

A() is an object used to encapsulate a collection of keyword arguments. objects can be combined using theandoperators. Which is equivalent to the SQLclause: objects can be negated using theoperator, …

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PG::Error (FATAL: too many connections for role "xxxxxxx") image
PG::Error (FATAL: too many connections for role "xxxxxxx")

PostgreSQL could be configured to limit number of simultaneous connections to the database. The heroku comes with plans having connection limits. The 'Hobby' plans comes with 20 connections where as …

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Top 10 Programming Languages Used in Web Development image
Top 10 Programming Languages Used in Web Development

Python Python is an interpreted(processed at runtime by the interpreter), object-oriented(supports Object-Oriented style), interactive, simple, easy to learn, portable, extensible, embedded, high-level programming language for general-purpose programming. Created by Guido …

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Python - a general-purpose programming language. image
Python - a general-purpose programming language.

Python is an interpreted(processed at runtime by the interpreter), object-oriented(supports Object-Oriented style), interactive, simple, easy to learn, portable, extensible, embedded, high-level programming language for general-purpose programming. Created by Guido van …

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Is autoescape off in django safe? image
Is autoescape off in django safe?

The autoescape would be a protection against cross site scripting, not sql injection. Turning autoescape off would mean you trust what is in "text", wherever it came from, not to …

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Python sort arrays with sorted method image
Python sort arrays with sorted method

Python provides a methodwhich returns the sorted array and will not change the original array, where as with change the array in place. sorted This method sorts the list and …

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Export results of SQLs from Heroku using Data Clips image
Export results of SQLs from Heroku using Data Clips

Heroku comes with nice database backup tools, both command line and web based. But how to export results of an SQL query? Heroku provides Data Clips. Data clips are a …

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Building a form - HTML Vs Django image
Building a form - HTML Vs Django

While creating a simple form in HTML we needs more works to be done in our templates like this: username.html As well as its <input> elements, a form must specify …

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Python magic method __init__ image
Python magic method __init__

Python comes with magic methods that starts its name with . The most common one is . What is so magical about ? The method need not be called or …

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Python magic method __new__ image
Python magic method __new__

Many developers believe that is the first method invoked in the life-cycle of an object. When we create an object or instantiate a class, the first method that gets called …

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Python sort list of dict by calculated value image
Python sort list of dict by calculated value

We often need to sort a list of dictionaries by calculated value. Python's sorted is very powerful so that it can do literally anything with custom key function Assume that …

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Python magic method __del__ image
Python magic method __del__

One of the useful magic method is __del__, which is the python destructor. It doesn't implement the behavior of del(x) instead, it defines the behavior for when an object is …

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