Vinyl or CD the age old debate essays

Vinyl or CD the age old debate essays At the beginning of the last decade of the Twentieth century a new media for the storage and playback of music came into the picture. The compact disc was a phenomenon of sorts, causing people to completely rebuild record collections that had taken years to build. It was a situation of, out with the old in with the new. There seemed to be no place for the vinyl records that had been so true to so many for so long. Compact discs do have several benefits over the vinyl records of the past, but there is also something about a record on vinyl that sets it apart from its digital counterpart. Convenience is likely the most noticeable benefit that compact discs have over vinyl records. They are easily stored in a binder or on a small shelf. You can load some stereos up with several at a time and have continuous play of music for hours with out having to deal with changing anything. The compact disk also brought the concept of quality sound out of the home and into the cars and walkways of the world, something the cassette never quite managed to do. Essentially for the busy lifestyle that was embodied by the nineties in America the compact disc made sense convenience wise. Before too long the major record companies stopped producing vinyl releases of many of the albums they released in favor of the new cheaper to produce compact discs. Less and less could you buy new releases on vinyl and even more rarely could you buy reissues of older albums. If you wanted to listen to new music or a copy of past favorite you were left with compact disc as the only quality choice. Therefore availability of new music became a strong benefit of compact discs. Another commonly mentioned benefit of compact discs is there durability and easy of care. You can play a compact disc millions of times and it will sound the same each and every time. They are susceptible to scratches and finger prints, but both are easily avoided ...

The Power of Pythons String Templates

The Power of Pythons String Templates Python is an interpreted, object-oriented, high-level programming language. It is easy to learn because its syntax emphasizes readability, which reduces the expense of program maintenance. Many programmers love working with Python because- without the compilation step- testing and debugging go quickly.​ Python Web Templating Templating, especially web templating, represents data in forms usually intended to be readable by  a viewer. The simplest form of a templating engine substitutes values into the template to produce the output.   Aside from the string constants and the deprecated string functions, which moved to string methods, Pythons string module also includes string templates. The template itself is a class that receives a string as its argument. The object instantiated from that class is called a template string object. Template strings were first introduced in Python 2.4. Where string formatting operators used the percentage sign for substitutions, the template object uses dollar signs. $$ is an escape sequence; it is replaced with a single $.$identifier names a substitution placeholder matching a mapping key of identifier. By default, identifier must spell a Python identifier. The first non-identifier character after the $ character terminates this placeholder specification.${identifier} is equivalent to $identifier. It is required when valid identifier characters follow the placeholder but are not part of the placeholder, such as ${noun}ification. Outside of these uses of the dollar sign, any appearance of $ causes a ValueError to be raised. The methods available through template strings are as follows: Class string. Template(template): The constructor takes a single argument, which is the template string.Substitute(mapping, **keywords): Method that substitutes the string values (mapping) for the template string values. Mapping is a dictionary-like object, and its values may be accessed as a dictionary. If the keywords argument is used, it represents placeholders. Where both mapping and keywords are used, the latter takes precedence. If a placeholder is missing from mapping or keywords, a KeyError is thrown.Safe_substitute(mapping, **keywords): Functions similarly to substitute(). However, if a placeholder is missing from mapping or keywords, the original placeholder is used by default, thus avoiding the KeyError. Also, any occurrence of $ returns a dollar sign. Template objects also have one publicly available attribute: Template is the object passed to the constructors template argument. While read-only access is not enforced, it is best not to change this attribute in your program. The sample shell session below serves to illustrate template string objects. from string import Template s Template($when, $who $action $what.) s.substitute(whenIn the summer, whoJohn, actiondrinks, whaticed tea) In the summer, John drinks iced tea. s.substitute(whenAt night, whoJean, actioneats, whatpopcorn) At night, Jean eats popcorn. s.template $when, $who $action $what. d dict(whenin the summer) Template($who $action $what $when).safe_substitute(d) $who $action $what in the summer