Small Overview about WSGI?

What is WSGI?

WSGI is the Web Server Gateway Interface.

It is a specification that describes how a web server communicates with web applications, and how web applications can be chained together to process one request.

WSGI is a specification, laid out in PEP 333, for a standardized interface between Web servers and Python Web frameworks/applications.

The goal is to provide a relatively simple yet comprehensive interface capable of supporting all (or most) interactions between a Web server and a Web framework. (Think "CGI" but programmatic rather than I/O based.)

An additional goal is to support "middleware" components for pre- and post-processing of requests: think gzip, recording, proxy, load-balancing.

Main Features

- WSGI gives you flexibility.

Application developers can swap out web stack components for others. For example, a developer can switch from Green Unicorn to uWSGI without modifying the application or framework that implements WSGI. From PEP 3333:

- WSGI servers promote scaling.

Serving thousands of requests for dynamic content at once is the domain of WSGI servers, not frameworks. WSGI servers handle processing requests from the web server and deciding how to communicate those requests to an application framework's process. The segregation of responsibilities is important for efficiently scaling web traffic.

Video for WSGI

Small Overview about Mezzanine?

What is Mezzanine?

Mezzanine is a powerful, consistent, and flexible content management platform. Built using the Django framework, Mezzanine provides a simple yet highly extensible architecture that encourages diving in and hacking on the code. Mezzanine is BSD licensed and supported by a diverse and active community.

In some ways, Mezzanine resembles tools such as Wordpress, providing an intuitive interface for managing pages, blog posts, form data, store products, and other types of content. But Mezzanine is also different. Unlike many other platforms that make extensive use of modules or reusable applications, Mezzanine provides most of its functionality by default. This approach yields a more integrated and efficient platform.

Features

Hierarchical page navigation
Save as draft and preview on site
Scheduled publishing
Drag-and-drop page ordering
WYSIWYG editing
In-line page editing
Drag-and-drop HTML5 forms builder with CSV export
SEO friendly URLs and metadata
E-commerce / Shopping cart module (Cartridge)
Configurable dashboard widgets
Blog engine
Tagging
Free Themes, and a Premium Themes Marketplace
User accounts and profiles with email verification
Translated to over 35 languages
Sharing via Facebook or Twitter
Multi-lingual sites
Custom templates per page or blog post
Twitter Bootstrap integration
API for custom content types
Search engine and API

Mezzanine is an open source project managed using both the Git and Mercurial version control systems.

Video for Mezzanine blogging

https://www.youtube.com/watch?v=3I5nrcsy7RI

Small Overview about Redmine?

What is Redmine?
Redmine is a flexible project management web application. Written using the Ruby on Rails framework, it is cross-platform and cross-database.

Redmine is open source and released under the terms of the GNU General Public License v2 (GPL).

It is a cross-platform, cross-database, and open source tool that also has issue-tracking features. Users can manage multiple projects and subprojects, and have access to many planning, tracking, and documenting features available from similar commercial products.

Redmine has a news area where members can publish news items. It allows the creation of documents, such as user documentation or technical documentation, which can be downloaded by others. A Files module is a table that lists all uploaded files and its details.

Users can easily create project wikis with the help of a toolbar. Other features include custom fields for creating additional information, and a Repository to view a given revision and the latest commits. The software can be configured to receive emails for issue creation and comments. It also supports particular versions of different databases, such as MySQL, PostgreSQL, MS SQL Server, and SQLite. API and plug-ins are also available.

Features

Multiple projects support
Flexible role based access control
Flexible issue tracking system
Gantt chart and calendar
News, documents & files management
Feeds & email notifications
Per project wiki
Per project forums
Time tracking
Custom fields for issues, time-entries, projects and users
SCM integration (SVN, CVS, Git, Mercurial and Bazaar)
Issue creation via email
Multiple LDAP authentication support
User self-registration support
Multilanguage support
Multiple databases support

Video for Redmine Introduction

https://www.youtube.com/watch?v=sAobJ1kmyqA

Small Overview about Dash in Python?

What is Dash?

Dash is a Python framework for building analytical web applications. No JavaScript required.

Written on top of Flask, Plotly.js, and React.js, Dash is ideal for building data visualization apps with highly custom user interfaces in pure Python. It's particularly suited for anyone who works with data in Python.

Through a couple of simple patterns, Dash abstracts away all of the technologies and protocols that are required to build an interactive web-based application. Dash is simple enough that you can bind a user interface around your Python code in an afternoon.

Dash apps are rendered in the web browser. You can deploy your apps to servers and then share them through URLs. Since Dash apps are viewed in the web browser, Dash is inherently cross-platform and mobile-ready.

Benefits

1) Lightweight
- Dash apps require very little boilerplate to get started: An app like this weighs in at just 40 lines of pure Python. Dash provides direct control
2) Direct Control
- Dash provides a simple interface for tying UI controls, like sliders, dropdowns, and graphs, with your Python data analysis code. Dash is Composable and Modular
3) Completely Customizable
- Every aesthetic element of a Dash app is customizable. Dash apps are built and published in the Web, so the full power of CSS is available.

The video for Dash in Python

https://www.youtube.com/watch?v=e4ti2fCpXMI

Small Overview about PyTorch?

What is PyTorch?

PyTorch is an open source machine learning library for Python, based on Torch, used for applications such as natural language processing. It is primarily developed by Facebook's artificial-intelligence research group, and Uber's "Pyro" software for probabilistic programming is built on it.

PyTorch is a python package that provides two high-level features:

Tensor computation (like numpy) with strong GPU acceleration
Deep Neural Networks built on a tape-based autodiff system

PyTorch has a unique way of building neural networks: using and replaying a tape recorder.

Most frameworks such as TensorFlow, Theano, Caffe and CNTK have a static view of the world. One has to build a neural network, and reuse the same structure again and again. Changing the way the network behaves means that one has to start from scratch.

With PyTorch, we use a technique called Reverse-mode auto-differentiation, which allows you to change the way your network behaves arbitrarily with zero lag or overhead.

Our inspiration comes from several research papers on this topic, as well as current and past work such as autograd, autograd, Chainer, etc.

Video for PyTorch

https://www.youtube.com/watch?v=nbJ-2G2GXL0

Small Overview about Plone?

What is Plone?

Plone CMS is an open source Content Management System for managing information and administering content. Plone is backed by Plone Foundation - international non-profit organization. The organization holds the copyright, and Plone Content Management System is available under a dual licensing scheme, GPL and a commercial license.

Plone Content Management System was founded in 1999 by Alan Runyan (USA), Alexander Limi (Norway) and Vidar Andersen (Norway). Plone has 200 core developers and more than 300 solution providers in 57 different countries.

Plone CMS is built on top of the Zope web application server and Zope's Content Management Framework, written in Python. Plone Content Management System is ideal as an intranet server, as a document publishing system and as a groupware tool for collaboration between separately located entities. A versatile software product like Plone Content Management System can be used in a myriad of ways. Plone works on top of Linux, Windows, Mac OSX, and other Unix variants.

Features:

ENTERPRISE INTEGRATION
FLEXIBLE WORKFLOWS
INDUSTRIAL STRENGTH SECURITY
LIMITLESS EXTENSIBILITY
ROBUST SCALABILITY

Main Benefits

Object-oriented navigation – Plone is an object-oriented system that uses folder-based navigation with human-readable URLs. Customizable navigation portlets offer flexible user guidance.

Search engine optimization – The compliance to web standards, as well as the automatic production of machine-readable sitemaps make Plone a search engine-optimized system.

Multilingual – Plone is designed for international use, featuring over 50 different languages, including Arabic, Hebrew and Chinese.

Internal search engine – An internal search engine, featuring advanced options facilitates finding specific information instantaneously. Various search engines (e. g. Solr GSA) can be plugged in via add-ons.

Social networking – Plone supports social networking by automatically generating feeds out of search results and folder contents. A wide range of extensions and add-on products integrate Plone into other social networks.

Accessibility – Plone is accessible and complies to WAI-AA standard and the U.S. Government Section 508. Since public institutions are legally obliged to offering barrier-free websites, Plone can perfectly assist on these efforts – including a barrier-free UI for editors as well.

Video for Plone CMS

https://www.youtube.com/watch?v=HSHE9d5gzFE

Small Introduction about aiohttp in python?

What is aiohttp?
Asynchronous HTTP client/server framework for asyncio and Python

Features:

Supports both client and server side of HTTP protocol.
Supports both client and server Web-Sockets out-of-the-box and avoids Callback Hell.
Provides Web-server with middlewares and pluggable routing.

Commands

pip install aiohttp

You may want to install optional cchardet library as faster replacement for chardet:

pip install cchardet

For speeding up DNS resolving by client API you may install aiodns as well. This option is highly recommended:

pip install aiodns

Example

import aiohttp
import asyncio

async def fetch(session, url):
async with session.get(url) as response:
return await response.text()

async def main():
async with aiohttp.ClientSession() as session:
html = await fetch(session, 'http://python.org')
print(html)

if __name__ == '__main__':
loop = asyncio.get_event_loop()
loop.run_until_complete(main())

Video for aiohttp

https://www.youtube.com/watch?v=Z784Mwm4VBg

Small Introduction About Seaborn?

What is Seaborn?
Seaborn is a Python data visualization library based on matplotlib. It provides a high-level interface for drawing attractive and informative statistical graphics.

Features

A dataset-oriented API for examining relationships between multiple variables
Specialized support for using categorical variables to show observations or aggregate statistics
Options for visualizing univariate or bivariate distributions and for comparing them between subsets of data
Automatic estimation and plotting of linear regression models for different kinds dependent variables
Convenient views onto the overall structure of complex datasets
High-level abstractions for structuring multi-plot grids that let you easily build complex visualizations
Concise control over matplotlib figure styling with several built-in themes
Tools for choosing color palettes that faithfully reveal patterns in your data

Seaborn aims to make visualization a central part of exploring and understanding data. Its dataset-oriented plotting functions operate on dataframes and arrays containing whole datasets and internally perform the necessary semantic mapping and statistical aggregation to produce informative plots.

Example Code

import seaborn as sns
sns.set()
tips = sns.load_dataset("tips")
sns.relplot(x="total_bill", y="tip", col="time",
hue="smoker", style="smoker", size="size",
data=tips);

Video for Seaborn
https://www.youtube.com/watch?v=eMkEL7gdVV0

Small Overview about WSGI?

References

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