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Articles on Trending Technologies
Technical articles with clear explanations and examples
Read and write tar archive files using Python (tarfile)
The ‘tar’ utility was originally introduced for UNIX operating system. Its purpose is to collect multiple files in a single archive file often called tarball which makes it easy to distribute the files. Functions in tarfile module of Python’s standard library help in creating tar archives and extracting from the tarball as required. The archives can be constructed with gzip, bz2 and lzma compressions or without any compression at all.Main function defined in this module is main() using which writing to tar file or reading from it is accomplished.Open()This function returns a TarFile object corresponding to file name which is ...
Read MoreWhat are the consumer rights and responsibilities?
Shopper rights are presently a vital part of our lives. They have been well framed and tremendously discussed. We have all made utilization of them eventually in our day to day activities. Market assets and impacts are developing every day and so is the familiarity with consumer rights. These rights are well characterized and there are agencies like the consumer courts and government offices that work towards shielding them.Keeping in mind the goal to protect consumer interest, six rights were put forth by consumer rights activists of the West, which are:Right to InformationRight to SafetyRight to ChoiceRight to be HeardThe ...
Read MoreShould I use , , or for SVG files?
To add SVG files, you can use , or element in HTML. Choose any one of them according to your requirement. Here’s how you can add SVG, elementUse the tag for images without interaction.The disadvantage is you cannot manipulate images with JavaScript. elementThe element is used to define an embedded object within an HTML document. Use it to embed multimedia like audio, video, flash, etc in the web page. Your browser does not support SVG elementThe tag wasn’t part of the HTML 4 specification and is new in HTML5. It validates in an HTML5 page.
Read MoreHow to use .svg files in a webpage?
The svg files are Scalable Vector Graphics. You can add it to a web page using the , , or tag.The .svg file is to be referenced in the src attribute of the tag. Let’s see how to add it using the tag.You can try to run the following code to learn how to use .svg files in a web page. We have a smiley.svg file − HTML SVG Design
Read MorePython getpass Module
There are two functions defined in getpass module of Python’s standard library. They are useful whenever a terminal based application needs to be executed only after validating user credentials.getpass()This function prompts the user to enter a password. By default the keys entered by user in the terminal are not echoed. Also the default prompt that appears on terminal is ‘password’ which can be customized by providing a string as parameter.In following example, Python prompt is invoked from Command prompt terminal on Windows. The password entered is not echoed in the terminal.C:\python36>python Python 3.6.5 (v3.6.5:f59c0932b4, Mar 28 2018, 17:00:18) [MSC v.1900 ...
Read MoreSupport for line-oriented command interpreters in Pytho
The cmd module contains only one class called Cmd. This is used as base class for a user defined framework for line oriented command line interpreters.CmdAn object of this class or its subclass provides the line oriented interpreter framework. Important methods of this class inherited by the subclass are listed below.cmdloop()This method sends the object in a loop, accepts inputs and sends the same to appropriate command handler method in the class.As the loop starts an introductory message (give as parameter to cmdloop() method) will be displayed with a default (cmd) prompt which may be customized by prompt attribute.The interpreter ...
Read MoreHow to Convert Hexadecimal to Decimal?
Whereas Hexadecimal number is one of the number systems which has value is 16 and it has only 16 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and A, B, C, D, E, F. Where A, B, C, D, E and F are single bit representations of decimal value 10, 11, 12, 13, 14 and 15 respectively. Whereas Decimal system is most familiar number system to the general public. It is base 10 which has only 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.Conversion from Hexadecimal to Decimal number systemThere are various ...
Read MoreDecimal Number System
Number System represents value of number with respect to its given base. Based on its Base value, a number has unique representation and different number systems have different representation of the same number. For example, Binary, Octal, Decimal and Hexadecimal Number systems are used in microprocessor programming.If the Base value of a number system is 10, then it is called Decimal number system which has most important role in the development of science and technology. This is the weighted (or positional) number representation, where value of each digit is determined by its position (or their weight) in a number. This ...
Read MoreHexadecimal Number System
Hexadecimal Number System is one the type of Number Representation techniques, in which there value of base is 16. That means there are only 16 symbols or possible digit values, there are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F. Where A, B, C, D, E and F are single bit representations of decimal value 10, 11, 12, 13, 14 and 15 respectively. It requires only 4 bits to represent value of any digit. Hexadecimal numbers are indicated by the addition of either an 0x prefix or an h suffix.Position of every ...
Read MoreBinary Number System
Binary Number System is one the type of Number Representation techniques. It is most popular and used in digital systems. Binary system is used for representing binary quantities which can be represented by any device that has only two operating states or possible conditions. For example, a switch has only two states: open or close.In the Binary System, there are only two symbols or possible digit values, i.e., 0 and 1. Represented by any device that only 2 operating states or possible conditions. Binary numbers are indicated by the addition of either an 0b prefix or an 2 suffix.Position of ...
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