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Python is an interpreted high-level general-purpose programming language. Its design philosophy emphasizes code readability with its use of significant indentation. Its language constructs as well as its object-oriented approach aim to help programmers write clear, logical code for small and large-scale projects. It supports multiple programming paradigms, including structured (particularly, procedural), object-oriented and functional programming. It is often described as a "batteries included" language due to its comprehensive standard library. Python 2.0 was released in 2000 and introduced new features, such as list comprehensions and a cycle-detecting garbage collection system (in addition to reference counting). Python 3.0 was released in 2008 and was a major revision of the language that is not completely backward-compatible. Python 2 was discontinued with version 2.7.18 in 2020. Van Rossum shouldered sole responsibility for the project, as the lead developer, until 12 July 2018, when he announced his "permanent vacation" from his responsibilities as Python's "benevolent dictator for life", a title the Python community bestowed upon him to reflect his long-term commitment as the project's chief decision-maker. Python 2.0 was released on 16 October 2000, with many major new features, including a cycle-detecting garbage collector (in addition to reference counting) for memory management and support for Unicode. Object-oriented programming and structured programming are fully supported, and many of its features support functional programming and aspect-oriented programming (including by metaprogramming It also features dynamic name resolution (late binding), which binds method and variable names during program execution. Python's design offers some support for functional programming in the Lisp tradition. It has Rather than having all of its functionality built into its core, Python was designed to be highly extensible (with modules). This compact modularity has made it particularly popular as a means of adding programmable interfaces to existing applications. Van Rossum's vision of a small core language with a large standard library and easily extensible interpreter stemmed from his frustrations with ABC, which espoused the opposite approach. Python strives for a simpler, less-cluttered syntax and grammar while giving developers a choice in their coding methodology. In contrast to Perl's "there is more than one way to do it" motto, Python embraces a "there should be one— and preferably only one —obvious way to do it" design philosophy. Python's developers strive to avoid premature optimization, and reject patches to non-critical parts of the CPython reference implementation that would offer marginal increases in speed at the cost of clarity. When speed is important, a Python programmer can move time-critical functions to extension modules written in languages such as C, or use Py Py, a just-in-time compiler. Cython is also available, which translates a Python script into C and makes direct C-level API calls into the Python interpreter. Python's developers aim for the language to be fun to use. This is reflected in its name—a tribute to the British comedy group Monty Python A common neologism in the Python community is pythonic, which can have a wide range of meanings related to program style. To say that code is pythonic is to say that it uses Python idioms well, that it is natural or shows fluency in the language, that it conforms with Python's minimalist philosophy and emphasis on readability. In contrast, code that is difficult to understand or reads like a rough transcription from another programming language is called unpythonic. Its formatting is visually uncluttered, and it often uses English keywords where other languages use punctuation. Unlike many other languages, it does not use curly brackets to delimit blocks, and semicolons after statements are allowed but are rarely, if ever, used. It has fewer syntactic exceptions and special cases than C or Pascal. Python uses whitespace indentation, rather than curly brackets or keywords, to delimit blocks. An increase in indentation comes after certain statements; a decrease in indentation signifies the end of the current block.) operates by binding a name as a reference to a separate, dynamically-allocated object. Variables may subsequently be rebound at any time to any object. In Python, a variable name is a generic reference holder and does not have a fixed data type associated with it. However, at a given time, a variable will refer to some object, which will have a type. This is referred to as dynamic typing and is contrasted with statically-typed programming languages, where each variable may only contain values of a certain type. Python does not support tail call optimization or first-class continuations, and, according to Guido van Rossum, it never will. Before 2.5, generators were lazy iterators; information was passed unidirectionally out of the generator. From Python 2.5, it is possible to pass information back into a generator function, and from Python 3.3, the information can be passed through multiple stack levels. In Python, a distinction between expressions and statements is rigidly enforced, in contrast to languages such as Common Lisp, Scheme, or Ruby. For example: Statements cannot be a part of an expression, so list and other comprehensions or lambda expressions, all being expressions, cannot contain statements. A particular case of this is that an assignment statement such as Apart from this, Python also provides methods, often called dunder methods (due to their names beginning and ending with double-underscores), to allow user-defined classes to modify how they are handled by native operations such as length, comparison, in arithmetic operations, type conversion, and many more. Python uses duck typing and has typed objects but untyped variable names. Type constraints are not checked at compile time; rather, operations on an object may fail, signifying that the given object is not of a suitable type. Despite being dynamically-typed, Python is strongly-typed, forbidding operations that are not well-defined (for example, adding a number to a string) rather than silently attempting to make sense of them. Python allows programmers to define their own types using classes, which are most often used for object-oriented programming. New instances of classes are constructed by calling the class (for example, and from Python 3.5, the syntax of the language allows specifying static types but they are not checked in the default implementation, CPython. An experimental optional static type checker named mypy supports compile-time type checking. can also be unary to represent positive and negative numbers respectively). The division between integers produces floating-point results. The behavior of division has changed significantly over time: Due to Python's extensive mathematics library, and the third-party library Num Py that further extends the native capabilities, it is frequently used as a scientific scripting language to aid in problems such as numerical data processing and manipulation. For Internet-facing applications, many standard formats and protocols such as MIME and HTTP are supported. It includes modules for creating graphical user interfaces, connecting to relational databases, generating pseudorandom numbers, arithmetic with arbitrary-precision decimals,), but most modules are not. They are specified by their code, internal documentation, and test suites. However, because most of the standard library is cross-platform Python code, only a few modules need altering or rewriting for variant implementations. As of September 2021, Most Python implementations (including CPython) include a read–eval–print loop (REPL), permitting them to function as a command line interpreter for which the user enters statements sequentially and receives results immediately. Python comes with a Integrated development environment (IDE) called IDLE, which is more beginner based. Other shells, including IDLE and IPython, add further abilities such as improved auto-completion, session state retention and syntax highlighting. As well as standard desktop integrated development environments, there are Web browser-based IDEs; Sage Math (intended for developing science and math-related Python programs); Python Anywhere, a browser-based IDE and hosting environment; and Canopy IDE, a commercial Python IDE emphasizing scientific computing. CPython is distributed with a large standard library written in a mixture of C and native Python. It is available for many platforms, including Windows (starting with Python 3.9, the Python installer deliberately fails to install on Windows 7 and 8; Python's development is conducted largely through the Python Enhancement Proposal (PEP) process, the primary mechanism for proposing major new features, collecting community input on issues and documenting Python design decisions. Enhancement of the language corresponds with development of the CPython reference implementation. The mailing list python-dev is the primary forum for the language's development. Specific issues are discussed in the Roundup bug tracker hosted at bugs. Many alpha, beta, and release-candidates are also released as previews and for testing before final releases. Although there is a rough schedule for each release, they are often delayed if the code is not ready. Python's development team monitors the state of the code by running the large unit test suite during development. Python's name is derived from the British comedy group Monty Python, whom Python creator Guido van Rossum enjoyed while developing the language. Monty Python references appear frequently in Python code and culture; The prefix Py- is used to show that something is related to Python. Examples of the use of this prefix in names of Python applications or libraries include Pygame, a binding of SDL to Python (commonly used to create games); Py Qt and Py GTK, which bind Qt and GTK to Python respectively; and Py Py, a Python implementation originally written in Python. Since 2003, Python has consistently ranked in the top ten most popular programming languages in the TIOBE Programming Community Index where, as of October 2021 An empirical study found that scripting languages, such as Python, are more productive than conventional languages, such as C and Java, for programming problems involving string manipulation and search in a dictionary, and determined that memory consumption was often "better than Java and not much worse than C or C ". With Web Server Gateway Interface, a standard API has evolved to facilitate these applications. Web frameworks like Django, Pylons, Pyramid, Turbo Gears, web2py, Tornado, Flask, Bottle and Zope support developers in the design and maintenance of complex applications. Pyjs and Iron Python can be used to develop the client-side of Ajax-based applications. SQLAlchemy can be used as a data mapper to a relational database. Twisted is a framework to program communications between computers, and is used (for example) by Dropbox. Libraries such as Num Py, Sci Py and Matplotlib allow the effective use of Python in scientific computing, with specialized libraries such as Biopython and Astropy providing domain-specific functionality. Sage Math is a computer algebra system with a notebook interface programmable in Python: its library covers many aspects of mathematics, including algebra, combinatorics, numerical mathematics, number theory, and calculus. Python can also be used to create games, with libraries such as Pygame, which can make 2D games. Python has been successfully embedded in many software products as a scripting language, including in finite element method software such as Abaqus, 3D parametric modeler like Free CAD, 3D animation packages such as 3ds Max, Blender, Cinema 4D, Lightwave, Houdini, Maya, modo, Motion Builder, Softimage, the visual effects compositor Nuke, 2D imaging programs like GIMP, and musical notation programs like scorewriter and capella. GNU Debugger uses Python as a pretty printer to show complex structures such as C containers. Esri promotes Python as the best choice for writing scripts in Arc GIS. Amiga OS 4 (using Python 2.7), Free BSD (as a package), Net BSD, Open BSD (as a package) and mac OS and can be used from the command line (terminal). Many Linux distributions use installers written in Python: Ubuntu uses the Ubiquity installer, while Red Hat Linux and Fedora use the Anaconda installer. Gentoo Linux uses Python in its package management system, Portage. Python is used extensively in the information security industry, including in exploit development. The Raspberry Pi single-board computer project has adopted Python as its main user-programming language. Libre Office includes Python, and intends to replace Java with Python. Its Python Scripting Provider is a core feature Python's development practices have also been emulated by other languages.Different types of Scaffolding used for various types of construction. The 8 types of scaffoldings are trestle, steel, patented, suspended, cantilever, single, double, kwikstage scaffolding etc. To understand these Scaffoldings completely lets first learn its definition and then the uses of various Type of Scaffoldings, and their uses. In this blog you’ll find the most important scaffolding types with their images and explanation. By understanding the meaning, usage, purpose and results of each type of Scaffolding. You can easily select the various types of Scaffolding required for your construction work. This is also helpful in creating a safer environment for construction workers. Keep yourself updated from latest article about most trending products and share your thoughts. Scaffolding is an impermanent structure that works as a platform for the workers to perform the construction works while supporting the original structure. The Scaffolding structure changes depending on the type of construction and its requirements. It is essential that the Scaffolding is made from high quality material because it provides support for construction workers and the construction material. Wood or Metal (like steel) is used to construct Scaffolding for better performance. As the name suggests, this type of Scaffolding is supported on tripod type movable ladders. This scaffolding type is used primarily in indoors, like for repairs or painting works. The usage of Trestle Scaffolding is limited to indoors as the height in this Scaffolding is up to 5 meters only. Following its name, this Scaffolding type is created using steel tubes set by couplers and it is easy to assemble as well as disintegrate. Steel Scaffolding comes with vast benefits, thus has higher cost but it does provide higher safety standards during construction. The structure provides strength, durability and is fire resistant. Despite the cost, it is one of the most popular Scaffolding today owing to its benefits. Steel Scaffolding is mainly used for outdoor construction and bigger structures. This type of Scaffolding is also made using steel however, these are readymade Scaffoldings and are fitted with special couplings and frames etc. The readymade Scaffoldings are available in market and are ready to use once bought. When using the Patented Scaffolding, the working platform is set on the brackets, these brackets can be adjusted to the required level may differ according to scaffolding type. Suspended Scaffolding is used for a variety of repair works as well as painting. Mainly used in painting as the platform is adjustable to desired length multiple times. Suspended Scaffolding is created using rope or chains tied to the platform for the construction worker, which is then hanged from the roof with the height adjusted at desired level. Also known as, Single Frame Scaffolding, Cantilever Scaffolding has limited usage and requires various checks before the installation. In this Scaffolding system, the standards are supported by a chain of needles that are pulled out from the holes in the wall. There is another type of Cantilever Scaffolding, in which instead of wall the needles are supported inside the floors through the double frame Scaffolding. One needs to be very carefully and follow all the required steps when installing the Cantilever Scaffolding. Given below are the scenarios in which this type of Scaffolding is recommended: One of the basic and oldest methods used in Construction, Single scaffolding is mainly used for brick masonry. This type of Scaffolding includes standards, putlogs, ledgers, which links to the wall at a distance of 1.2 meters approximately. In addition, Ledgers join the standards at a vertical distance of 1.2 to 1.5 meters while the distance between the standards is 2 to 2.5 meters. Putlogs fixed at a distance of 1.2 to 1.5 meters, but extracted from gap in the wall at the end of the ledger. All these technical calculations when followed by book keep the structure sturdy and offer desired support. Double Scaffolding also known as the Independent Scaffolding, is the type of Scaffolding that is used mainly for the stone masonry job. It is very difficult to make holes in the stone walls for supporting the putlogs, hence two scaffoldings together create a sturdy structure for construction work. While the first row is 20 to 30 cm away from the wall, the second one is erected 1 meter far from the first row. With the support of both frames then putlogs are positioned. Additional steps are taken to make the structure firmer by adding cross braces and rakers. The last but not the least in the list is the Kwikstage Scaffolding system. This Scaffolding is contrived from hardwearing galvanized steel and is admired for its easy installation. Effortless to assemble as well as disintegrate, it is used for both big and small construction works. Kwikstage Scaffolding can easily replace regular scaffold system and provide safer and strong platform to work. Created using a durable and safe interlocking system, the patented Kwikstage modular system is customizable to any desired height. We offer Australia Scaffolding and are one of the most admired manufactures of scaffolding. Through this article, we have tried our best to keep the definitions simple, while adding images that clarifies any remaining doubts. The variety of Scaffoldings described here are some of the most used and successful Scaffoldings used in Construction. By understanding the meaning and the use of different type of Scaffoldings, one can easily select the right Scaffolding for their construction work with complete safety. part may be reproduced in any form without explicit written permission.