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Category Archives: Django Training

Python and its uses

What is python?

Python is an interpreted, high-level and general-purpose programming language. Python’s design philosophy emphasizes code readability with its notable use of significant indentation.

What are the uses of Python?

1. GENERAL WEB DEVELOPMENT / BUILDING WEB APPS – Python is one of the simplest programming languages, and we mean that in a good way. “Python, unlike other programming languages, emphasizes code readability, and allows you to use English keywords instead of punctuation…The readable and clean code base will help you to maintain and update the software without putting extra time and effort.”

2. SCIENTIFIC COMPUTING + DATA SCIENCE – Python is also used for scientific research and computing and even has several science-friendly or science-specific libraries including:

  • Astropy for astronomy

  • Biopython for biology and bioinformatics

  • Graph-tool for statistical analysis of graphs

  • Psychopy for neuroscience and experimental psychology.

3. MACHINE LEARNING – Yes, technically, machine learning falls under data science. Using Python for machine learning is pretty cool, so it felt like it warranted an additional line item. Machine learning includes things like speech recognition, financial services, even the recommendations Netflix serves up every time you log in that make you think, “How do they know?!”

4. STARTUPS – This seems like an odd item to include on the list, but it’s true: Startups, and especially tech startups, love Python because it’s easy to use and scalable. And I mean scalable. Take, for example, Dropbox.

5. FINTECH + THE FINANCIAL INDUSTRY – In 2016, HackerRank released a survey of various industries, revealing which programming languages they were prioritizing when hiri.

Phthon-django Training and Placements by DOCC kolkata. Call 9433526196, Visit www.docckolkata.com

Written by U Roy, DOCC kolkata

Cloud Computing and it’s benefits

What is cloud computing?

Cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet (“the cloud”) to offer faster innovation, flexible resources, and economies of scale.

Cloud computing is very important as it allows people access to the same kinds of applications through the internet. … This means the device accessing the cloud doesn’t need to work as hard. By hosting software, platforms, and databases remotely, the cloud servers free up the memory and computing power of individual computers.

Benefits of cloud computing :

  • Reduced IT costs – Moving to cloud computing may reduce the cost of managing and maintaining your IT systems. Rather than purchasing expensive systems and equipment for your business, you can reduce your costs by using the resources of your cloud computing service provider.

  • Scalability – Your business can scale up or scale down your operation and storage needs quickly to suit your situation, allowing flexibility as your needs change. Rather than purchasing and installing expensive upgrades yourself, your cloud computer service provider can handle this for you. Using the cloud frees up your time so you can get on with running your business.

  • Collaboration efficiency – Collaboration in a cloud environment gives your business the ability to communicate and share more easily outside of the traditional methods. If you are working on a project across different locations, you could use cloud computing to give employees, contractors and third parties access to the same files.

  • Flexibility of work practices – Cloud computing allows employees to be more flexible in their work practices. For example, you have the ability to access data from home, on holiday, or via the commute to and from work (providing you have an internet connection)

Cloud Computing, Java Training by DOCC kolkata. Visit www.docckolkata.com / Call 9433526196

Written by U Roy, DOCC kolkata

 

Will PHP exist in 2021?

You have to read it twice, it’s like will Life exist in 2020? Well, No one can tell you this.

But yes, you can look at the exisiting things as many websites, softwares are built using PHP only. It will totally depend upon the enhancements being made in the future.

As there are many other languages like Java, Python which is taking an edge over PHP nowadays, but we can never say that PHP is less.

As many people and organisations still work on PHP because they find this language as a proper fit for their projects.

Even C++ was developed back in 80s, but still it’s one of the strongest languages. So, one can never answer this question. If you are having interest in PHP and want to learn its basics, then go with it without a second thought.

Remember, Language is a secondary thing, primary are your Logics.

 

On line and Off line PHP,WebDesign,Java,Wordpress,CI, Laravel, Javascript, React JS, Vue JS,Angular JS,Node JS, Python, Django, Machine learning, AI, SEO, Mobile Android Apps Training-Placements and Outsourcing by DOCC kolkata.Call 9433526196.Visit www.docckolkata.com

 

 

 

Front-end development and its reality

Front-end development isn’t real  development?

There is some sentiment out there that front-end development isn’t real development. It’s a swaggering, trollish sentiment. Still, it’s fun to puff our chests back sometimes. Let’s try to put a point on why front-end development is every bit as difficult and worthy of the title as any other subset.

The practice of front end development is similar to playing the bass: it’s easy to learn but difficult to master. There is a lot more to it than HTML and CSS

We have to deal with cross browser compatibility.

This was far and away the most cited gripe in the group. While Internet Explorer continues to be the brunt of most jokes, every browser has its own quirks that often require special development techniques to overcome.

It’s rather expected of us that we know how to build websites that can work cross-browser. We should know what browsers support what and how to debug and overcome browser-specific issues. We should know how to do emulate or otherwise test on a variety of browsers.

We should know tools that help us with cross-browser problems either automatically or enable us to write code to handle situations of support and nonsupport of features. We should know how to do fallbacks. We should know about progressive enhancement and graceful degradation.

Cross-browser compatibility is a hugely complex development task.

In addition to dealing with browser inconsistencies, front-end developers are also charged with developing for as many screen sizes, screen orientations, pixel densities, and input types as possible.

The burden of the massive landscape of different screens, browsers, and capabilities lies most heavily on front-end developers.

Frameworks, libraries, preprocessing, dependencies, plugins…

It used to be that linking up a stylesheet and maybe a JavaScript file in the HTML was all that was needed to start designing and building a site. In fact, that’s still the baseline.

Today’s development feels a lot different. The toolchain is a lot thicker. We’re making choices about build processes, which libraries to use, what languages to write in, how invested in future syntaxes we want to be, how much we want to depend on frameworks, which third-party tools make sense and feel safe to use.

Not only is it fatiguing to think about the choices, it’s increasingly difficult to know what the best choices are and if these choices are smart in the long term.

There are just as many choices, or more, at the front end level of development than there are anywhere else. Not to mention the landscape moves extremely quickly.

Many of today’s frameworks and CMS’s, straddle the line between lots of different disciplines. Front-end developers are right in the middle of it all. We’re ultimately responsible for design—how the site looks. We’re helping content people ensure they have what they need and they give us what we need. We’re working in templates prying out the data we need in the formats we need. We’re handling user input and ensuring it funneling where it goes for more back-end concerns.

The barrier to entry for front-end development is fairly low. Everyone has heard of HTML. They “know enough to be dangerous” as it were. Because that barrier is low and because it’ so easy to dabble, it makes sense people assume there isn’t that much to know and that front-end development isn’t particularly difficult.

the maxim about naming things being one of the hardest problems in computer science. Us front-enders are naming things all the time. Class names and IDs, data attributes, file names, communicating patterns with your team. It’s endless. It feels like there are dozens of name choices on an average day.

Not to mention the task of copywriting often falls to us, which isn’t quite naming but is in a similar vein of difficulty.

“The right way” and “the wrong way” aren’t as cut and dry as with back-end development.

In back-end development, if what you are expecting to happen happens, you’ve succeeded. Surely they are different ways to get there, some better than others. But in front-end development, the paths to completing a task seem endless. Even if you’ve seemingly succeeded, it can feel like just a matter of time until a bug is found in how you’ve done it.

CSS is very hard to test.

Back-end languages (and even JavaScript) can use unit testing and integration testing to help make sure the code works as expected. CSS has no such luxury. There are certainly people trying and there is some information and tools out there. But none of it is all that great and there are very few success stories.

Bugs can be subtle, confusing, and unexpected. Worse, a seemingly little change may have an adverse effect in an unexpected place where you don’t notice until it’s too late.

There are linting tools, which help a little. There are some style guide enforcement tools, but they don’t really help enforce more important things like adherence to naming standards.

Front end developers need to hold a very strong understanding of the entire website in their head in order to be most effective and efficient.

JavaScript is just as complex as any other programming language. It’s weird and hard.

JavaScript is front-end development. JavaScript is programming. Programming is part of software development. Software development is hard.

The rule of thumb is that 20% of the waiting for a website to load is from back-end concerns. Once HTML document has arrived, the rest of loading time is the concern of front-end developers. What resources are loaded, how many resources are loaded, how optimized they are, in what fashion they load in and how that feels, etc.

It’s where accessibility happens.

Building sites that are visually stunning is one thing and the accessibility of them is another. Designers care very much how users interact with a site and that might not always be a visual interaction. Designing and developing for disabilities is a discipline unto itself, but is most tightly tied to front-end development. Accessibility has its own set of specifications that sadly aren’t typically taught along with traditional front-end development training.

It’s hard to hire for.

Front-end developers are typically the hardest seats to fill. So front-end development is“real” development.

Written by D Roy, DOCC Kolkata. , Web design and Development Trainer. Visit www.docckolkata.com /  Call 9433526196

 

 

JavaScript knowledge to start learning PHP?

Do you have to know basic JavaScript to start learning PHP?

 

Both PHP and JavaScript are widely used together: PHP for serving the application, and JavaScript for interacting with the user. (As an alternative to PHP, JavaScript can also be used in servers with the help of NodeJs, but that may not be what you are looking for right now).

It doesn’t matter which one you learn first. However, since JavaScript is part of the HTML/CSS/JavaScript triangle, it makes sense to learn basic JavaScript before getting into PHP.

Then, experiment creating the same exercise with both languages to see how each one behaves.

Find out the reason why you need to learn PHP (based on your question), and why JavaScript is necessary when you use PHP for web development.

 

Do not pay attention when people tell you not to learn PHP.

PHP continues to be an important language to learn for the next decade and there are plenty of jobs available if you’re looking for a career.

Reason #1: The old PHP is gone. The new PHP is PHP7.

Reason #2: Laravel is the hottest framework in the planet. Laravel runs on PHP7 and you can use JavaScript for the front end via Vuejs (or even ReactJS). Both VueJS and React are the darlings of JavaScript right now (along with Angular but that uses TypeScript).

Reason #3: Drupal 8 and WordPress also use PHP7 and there are plenty of jobs out there for developers in this category.

Don’t get emotional with language adoption because it will consume your energies unnecessarily. Both JavaScript and PHP have their places in this industry. Figure that part out and move on.

Training by DOCC kolkata, lake gardens. Visit www.docckolkata.com, Call 9433526196

PYTHON AND AND ITS FRAMEWORK

PYTHON AND AND ITS FRAMEWORK

Django is a free and open source web application framework written in Python. A framework is nothing more than a collection of modules that make development easier. They are grouped together, and allow you to create applications or websites from an existing source, instead of from scratch.

This is how websites – even simple ones designed by a single person – can still include advanced functionality like authentication support, management and admin panels, contact forms, comment boxes, file upload support, and more. In other words, if you were creating a website from scratch you would need to develop these components yourself. By using a framework instead, these components are already built, you just need to configure them properly to match your site.

The Official Project Site describes Django as “a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel. It’s free and open source.”

Django offers a big collection of modules which you can use in your own projects. Primarily, frameworks exist to save developers a lot of wasted time and headaches and Django is no different.
Django was created with front-end developers in mind. “Django’s template language is designed to feel comfortable and easy-to-learn to those used to working with HTML, like designers and front-end developers. But it is also flexible and highly extensible, allowing developers to augment the template language as needed.”

If you’re going to be working with Python, especially for web applications or web design, you’ll want to remember the Django framework. It will certainly come in handy.
CherryPy is another Python-based framework that is great to work with, although it is designed with the absolute minimalist in mind. It’s a framework you’ll want to explore after you already have some experience working with Python.

Python-Django-Macheine learning-AI Training and Placements by DOCC Kolkata. Call 9433526196


JavaScript frameworks for quick software development:  

 

The popularity of Java script grows every day. It’s definitely the best scripting language which allows creating exciting  interfaces and simplifies the development of web applications, being a perfect open source app development software and making the sites interactive and convenient to use.

The Javascript web development frameworks are issued and updated daily and that’s why it is difficult at times to go with the tides and understand which famework is most suitable and best matching for the project.

Before choosing a web app framework to apply the requirement  and needs of the project to be taken into consideration.

The advantages of the frameworks

Javascript  framework is a number of features and functions written in Javascript language and ready  for the usage of the developers. These features simplify the interaction between the app and server and speed up the manipulating of the web page or app elements.

The main advantage of using a web application development  frameworks is the fact that it provides immediate reaction to the user interacting with the site immediately.

The basic content of the traditional sites without frameworks is stored  on the server and any new content , which is necessary to be upload requires reloading of pages. When frameworks are used , only the necessary blocks of a website are reloaded.

Some of the most advantageous benefits of the frameworks ‘usage:

  • COST: The cost of the app development for websites decreases due to the JavaScript frameworks because they are free and open source code.
  • Development speed: Java Script frameworks have good documentations. Some of the JavaScript frameworks are supported by such giant companies as Google etc. Due to such a lot of information, the speed of development increases.
  • Efficiency: The usage of the pre-created functions and templates allows to carry out the projects more effectively. The developers have to write less code, which results in delivering projects meeting higher standards and more quickly.

Most used and popular frameworks—

JavaScript frameworks have now become one of the most preferred web app development platforms for modern single page apps, social networks, e-commerce products and other software solutions creation.

At present, without using frameworks, the development of modern web products has become almost impossible. There are Some companies are still using classical Java Script software incurring higher development costs. As a consequence of classical JS complexity, lot of frameworks have appeared in the market, but the solid leadership in the software development market belongs to these three: Angular, React and Vue.

 

Angular

Angular is a cross-platform framework which keeps to the  MVC architectural pattern and supports a weak link between the display, data and logic of the components( integral parts of the app).  Angular shifts a certain part of server services to the client side and consequently the server workload decreases and the web application becomes lighter.

Due to Typescript the project code becomes clear , convenient for developer’s understanding and contains fewer errors. Angular strong points are remarkable documentations and references.

One of the week points of Angular is the high learning curve for the projects because a JavaScript developer  should know for instance , Type Script to start working with framework. It consequently makes the project  fulfillment  more difficult, especially the work is passed from one team to another. Another drawback of the Angular framework is the frequent release on the new versions. The 8th one already released in June, 2019.

 

React.js

React—is a java script library with open source code for user-interfaces development. For the first  time React was used in 2011in the face book newsfeed, then in 2012 in Instagram.

React is still being developed and supported by  Face book and Instagram. It can be used not only for browser-based web apps but also for mobile apps. The aim of the framework is to provide high speed , simplicity and operability of the apps on various platforms.

However, React is not a full-fledged Framework, but  a function library. To use it as a Framework, other third party libraries should be attached. React strengths are speed, lightweightness, cross-platform format  and big community.

The weakness is the necessity to use third party libraries for complete work which complicates the development process. Another drawback of the library is that it does not follow the standards in HTML or CSS CODE AS Angular and Vue.js do.;

 

Vue.js

Vue– is a progressive framework for user interfaces creation. Vue was made fit for gradual implementation  unlike Angular or React. It means progressive framework  gradually starting from certain pages, which makes the development much easier. The Vue.js creator is Even and You and the framework is widely used in Chinese companies. Not so long ago the repository management  GitLab also switched to Veu.js.

Vue deals with presentations layer tasks in the first turn, it simplifies the integration with other libraries and existing projects. Vue coopted the best features of Angular and React- the speed and lightweightness and the possibility to support such technologies as Type Script and JSX. However along with this the Vue frame remained true to the principles of CSS and HTML code writing. It facilitates quick web application development and makes the processes of project development and support easier.

Thus , for any developer who knows the basics of the front-end technologies will not be a problem to develop or support the projects on Vue.

At present, a small community can be called a weak point of the Frame work as no big corporations support it.  Nevertheless, popularity of the framework grows every year.

 

What to choose?

Every project is unique in its own way and  before starting the project detailed analysis and evaluation is required.

However, there are certain key aspects, which help to choose a particular technology for development:

Speed and simplicity of project development and support.

The speed of the development depends on the technologies, already used in the projects. In case Type Script or JSC have already been applied then  Angular or React correspondingly needed. But in case the project from scratch, it’s better to choose Vue .js due to its compliance with standards.

Trends:

All the frameworks are popular and will keep the leadership in the modern development marketin the coming years. It will not be a mistake to choose any of them . However Vue is vigoursly gaining popularity, followed by React.

 

Mobility and Stability:

Supposing  one framework is chosen and then decided to switch to another one and Vue. js is the best choice in this case because re-writing the projects on Angular or React will mean that the developers will most likely need to switch Type Script or JSX code to classical Java Script and HTML correspondingly.

One more important aspect to consider is the frequency of Frameworks update. Angular has serious updates issued every 06 months, React approximately once in a year. Vue is more stable in this sese and has serious updates once in several  years.

Java-Script-Angular-Node-React-Vue JS-Python-Django Training and placements by DOCC Kolkata.

Visit www.docckolkata.com / Call 9433526196

 

 

 


 

 

 

 

Laravel the best PHP Framework

Why Laravel Is The Best PHP Framework In 2018?

To develop a web application available a right PHP development framework for the business can be a very difficult task because there are so many frameworks are there. We have worked and tested other PHP development frameworks as well. However, we needed some additional features and capabilities.  Laravel is the best PHP framework in 2018.

Why Laravel is used by many industries worldwide?

 

The major technical advantages which make Laravel the best out of all.

 

Reasons why Laravel is the best PHP framework:

 

 

1) Authorization Technique: PHP framework:

Laravel makes implementation of authentication techniques very simple. Almost everything is configured extraordinarily. Laravel also provides a simple way to organize authorization logic and control access to resources.

 

 2) Object-Oriented Libraries:

 

One of the top reasons which make Laravel the best PHP framework is it has Object Oriented libraries and many other pre-installed ones.

One of the pre-installed libraries is the Authentication library. Although it is easy to implement, it has many advanced features, such as checking active users, Bcrypt hashing,  password reset, CSRF (Cross-site Request Forgery) protection, and encryption. PHP framework:

 

 3) Artisan:

 

Laravel offers a build in tool named as Artisan. A developer has to usually interact with the Laravel framework using a command line that creates and handles the Laravel project environment. Laravel provides a built-in tool for command-line called Artisan. This tool allows us to perform the majority of those repetitive and tedious programming tasks that most of the developers avoid performing manually.

 

 4) MVC Support:

 

Another reason which makes Laravel the best PHP framework is it supports MVC Architecture like Symfony, ensuring clarity between logic and presentation. MVC  helps in improving the performance, allows better documentation, and has multiple built-in functionalities. Here’s how the MVC works for Laravel.

 

 5) Security:

 

While developing an application everyone has to use some or the other ways too make the application secure. Laravel takes care of the security within its framework. It uses salted and hashed password, which means Laravel that the password would never save as the plain text in database. It uses Bcrypt hashing algorithm for generating an encrypted representation of a password. Laravel uses prepared SQL statements which make injection attacks unimaginable.

 

 6) Database Migration:

 

One pain point for developers is to keep database in sync between development machines. With Laravel database migrations, it is extremely easy. Enter Migrations. As long as you keep all of the database work in migrations and seeds, you can easily migrate the changes into any other development machine you have. This is yet another reason which makes Laravel the best PHP framework.

 

 7) Great Tutorials (Laracasts):

 

Unlike others (Codeigniter, Yii, CakePHP etc.) Laravel offers Laracasts which features a mix of free and paid video tutorials that show you how to use Laravel. The videos are all made by Jeffery Way, an expert and experienced instructor. He seems to have his finger on the pulse of the essentials and offers clear and concise instructions. The production quality is high, and the lessons are well-thought out and meaningful.

 

 8) Blade Templating Engine:

 

The Blade templating engine of Laravel is very intuitive and helps to work with the typical PHP/HTML spaghetti so much better, that’s it one of the best features of the framework. If you ever have had to chop up an if statement with HTML inside of it, you know exactly what I mean. But with blade, it’s almost effortless. Here’s how it goes:

9) Responsable Interface:

Responsable Interface is a new feature added in the Laravel with the release of Laravel 5.5 in August 2017. It is a class which is used to implement the interface which can be returned by using controller method. After that, the router is going to check for the instance of Responsable when preparing the response from “Illuminate\Routing\Router”.

 

10) Automatic Package Discovery:

 

Previously in the earlier versions of Laravel, it was not easy to install packages. However, in Laravel 5.5 a new feature called Automatic Package Discovery detects the packages automatically which users want to install. Meaning that now users don’t have to setup any aliases or providers from installing new packages in Laravel. Also, Laravel 5.5 allows developers to disable this feature for specific packages.

The amazing features as mentioned above are quite enough to understand that it’s the best PHP framework in 2017. However, you need developers to start your web development project. If you have a long-term project in mind that needs attention from the scratch then dedicated development team are appropriate.

However, if you want to make some minor tweaks or renovate your site you can extend your existing PHP development team with co-developers. Regardless of the needs, you must rely on a technology partner likeValueCoders for all your development needs.

The popularity of Laravel framework is on the rise due to its incredible features. Also, Laravel provides extensive community support as well.

For Laravel 5.6/5.7 Training – Contact DOCC Kolkata,

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