Python Command-line Arguments are well-known scripts for every python developer. They are specially designed to perform the arguments in python With the guidance of command-line arguments, that are passed to programs, you can manage with use...
Python Command-line Arguments are well-known scripts for every python developer. They are specially designed to perform the arguments in python
With the guidance of command-line arguments, that are passed to programs, you can manage with use cases. command-line arguments enable you to move programs to act with a particular goal in mind.
For Example to get extra data, or to get information from a certain source, and to combine this information in an ideal form.
In one point, operating systems deal with arguments, in specific documentation, for example:
UNIX: "- " go by a letter, as "- h"
GNU: "- - " go by a word, as "- - help"
Microsoft Windows: "/" go by either a letter or word, as "/help"
These methods exist because of recorded reasons. Many programs on UNIX-like frameworks support either the UNIX way, or the GNU way, or both.
The UNIX documentation is, for the most part, utilized, with single letter choices while GNU introduces an increase in meaningful choices, list especially valuable to report what is running.
Remember that both the name and the importance of an argument, are shown to a program - there is no big definition, however, a couple shows like - help for additional data on the use of the device.
As the engineer of a Python program you, have to choose which arguments are accepted, and what they look for, really. This requires exact Evaluation. Getting what is the best way to do it utilizing Python.
**Taking care of command line Arguments with Python **
Python 3 guide, four different methods for managing command-line Arguments. The most established one is the sys module. In the point of names, and its utilization.
It relates directly to the C library (libc). The second one is the getopt module, which handles both short, and long choices, including the evaluation of the parameters.
Moreover, two less-known ways exist. This is the argparse module that we got from the optparse module access up to Python 2.7, some time ago, and the docopt module is accessed from GitHub.
Every module is completely reported.
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**The sys Module **
This is a fundamental module that was sent, by distributing Python. from the starting days on. It has comparable methods, as the C library utilizing argc/argv to get to the Arguments.
The sys module applies the direction line arguments, in a basic rundown structure named as sys.argv.
Each rundown component speaks to a single Argument. The first - sys.argv - is the name of the Python script. The other sequence components - sys.argv to sys.argv[n] - are the command line arguments 2 to n.
As a mediator between the arguments, space is being used. Arguments values that contain a space in it must be placed.
What might be compared to argc, is only the quantity of components in the list. To get this worth to utilize the Python len() administrator. Example 1 will clarify this in detail.
**Example 1 **
In this first example, we know the way in which we were called. This data is kept in the first order line Argument, filed with 0. Listing 1 shows how you get the name of your Python program.
Example1: Determine the name of the **Python programming **
Save this code in a document named arguments programname.py, and afterward call it as shown in Listing 1. The output as it follows the following and contains the document name, including its full path.
Listing 1: Call the Script
$ python arguments programname.py
The program has the name arguments programname.py
$ python/home/client/arguments programname.py
the program has the name/home/client/arguments programname.py
**Example 2 **
In the second example we basically check, the quantity of direction line arguments, utilizing the built-in len() technique. sys.argv is the rundown that we need to look at.
In Example 2, an overview of 1 is subtracted to get the correct record (Argument list counters start from zero). As you may recall from Example 1, the main component contains the name of the Python program, which we avoid here.
I think I have suggested the best things about, Python Command line arguments. This is a Separate section in python, it has many features to explain, in upcoming article, I will explain them.
Before you get too far into your programming with Python, it is important to understand some of the words that can make the programming easier to understand. This chapter is going to take some time to look at the different words that are common in...
Before you get too far into your programming with Python, it is important to understand some of the words that can make the programming easier to understand. This chapter is going to take some time to look at the different words that are common in Python programming, and which we do talk about a bit in this guidebook, to help avoid some confusion and to help you get started with your first code.
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Class—this is a template that was used for creating user-defined objects.
Docstring—this is a string that will appear lexically first expression inside a module, function, or class definition. The object will be available to documentation tools.
Function—this is a block of code that is invoked when using a calling program. It is best used in order to provide a calculation or an autonomous service.
IDLE—this stands for Integrated Development Environment for Python.
This is the basic interpreter and editor environment that you can use along with Python. It is good for those who are just beginning with this and can work for those on a budget. It is a clear example of code and won’t waste a lot of time or space.
Immutable—this is an object within the code that is assigned a fixed
value. This could include tuples, strings, and numbers. You can’t alter the object and you will need to create a new object with a different value and store it first. This can be helpful in some cases, such as the keys in a dictionary.
Interactive—one thing that a lot of beginners like about Python is that it is so interactive. You can try out some different things in the interpreter and see how they will react right away in the results. It is a good way to improve your programming skills, test out a new idea you have and more.
List—this is a datatype within Python that is built in. It contains a mutable sequence of values that are sorted. It can include immutable values of numbers and strings as well.
Mutable—these are the objects that will be able to change their value within the program, but which are able to keep their original id().
Object—within Python, this is any data with a state, such as a value or an attribute, as well as a defined behavior, or a method.
Python 3000—Python 2 and Python 3 are the main two types of Python that are available. Many people have stuck with Python 2 since Python 3 does not have any backwards capabilities and they like using the databases on the older version. Python 3000 is a mythical option of Python that does allow this backward capability so you can use it and the Python 2.
String—this is one of the most basic types that you will find in Python that will store the text. In Python 2, the strings will store text so that the string type can then be used to hold onto binary data.
Triple quoted string—this is a string that has three instances of either the single quote or the double quote. It could have something like ‘’’I love tacos’’’. They are used for many reasons. They can help you to have double and single quotes in a string and they make it easier to go over a few lines of code without issues. Learn for Python training
Tuple—this is a datatype that has been built into Python. This datatype is an immutable ordered sequence of values. The sequence is the only part that is immutable. It can contain some mutable values, such as having a dictionary inside it, where the value’s can change.
Type—this is a category or sort of data that is represented in the programming languages. These types are going to differ in their properties, they including immutable and mutable options, as well as in their functions and methods. Python includes a few of these including dictionary types, tuple, list, floating point, long, integer, and string.
The Raspberry Pi is a wonderful piece of technology, but many people don't use it to its full potential. With your Raspberry Pi you can create anything you want – a robot that senses its environment, a media centre to watch movies, or a world of...
The Raspberry Pi is a wonderful piece of technology, but many people don't use it to its full potential. With your Raspberry Pi you can create anything you want – a robot that senses its environment, a media centre to watch movies, or a world of fantasy and adventure created from some simple lines of code and a lot of imagination from yourself.
In the 1980s, computer graphics were still in their infancy, with blocky game characters and a limited palette of colours to work with. It was very common for adventure and role-playing games to be completely text-driven, with the player using their imagination to create visions of the game world.
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Games such as Zork created rich worlds, with engaging stories and characters, but with very few graphics to illustrate the environments. This remained the case until the late 1980s and early 90s, and only changed due to some fantastic work by LucasArts, which created a collection of classic graphic adventure games such as Loom, Monkey Island and Full Throttle.
For this tutorial, we will be using our Raspberry Pi and a programming language called Python to create our very own text adventure, with our own game world and some characters to inhabit that world. And all of this will be created using some Python code and a few programming concepts.
Python is an easy-to-learn programming language, which has become a firm favourite for Raspberry Pi users and schools across the UK.
So what is Python?
Python is a textual programming language, and by that we mean that it is typed into an editor. Python uses a very forgiving syntax and is very easy to read, which makes learning to code a really enjoyable experience.
On the Raspberry Pi, we already have a great code editor installed as standard – it's called IDLE and we will be using it to build our game. You can find a link to IDLE on the Raspberry Pi desktop.
Python comes pre-installed on every Raspberry Pi that is running the Raspbian operating system. If you haven't got Raspbian installed on your Pi, you can grab a copy from the Raspberry Pi website.
It is part of the easy-to-use NOOBS (New Out Of the Box Software) archive, which can be downloaded and then extracted to a blank 4GB (or greater) SD card.
Currently there are two versions of Python available: versions 2.7 and 3. For this tutorial, we will be using 2.7, because it has the greatest amount of support and documentation. Python 3 is an excellent language to learn and it is certainly the future of the language, but it is currently in a state of flux and should only be used by experienced Python programmers.
Creating a narrative
Our game needs two things: a story to keep the player entertained, and logic to control how the story unfolds. For our story we're creating the world of Narule, where magic and adventure are around every corner. And we're creating a hero – you – who must travel the land, visiting new villages and settlements, and talking to people to learn more about this land and the dark shadow cast upon it.
To start our project off, we've created some narrative for you to expand upon. Feel free to make the story your own – that's the whole point of this tutorial. This is your game. To get you started, we've created some code to act as a starter template. You can download a free copy here.
Download the code, then open it using IDLE ('File > Open' and navigate to where you downloaded the code). Now take a look at the code and pay particular attention to any lines that start with a #, because these are comments in the code, which have been added to help you understand what the code is doing at that point.
Currently our code has a basic story for us to expand upon, and we will do that during the course of this tutorial. Our story unfolds via blocks of text that form our narrative, and you will see that each block looks similar to this:
chapter1 = "It was a cold night, and the rain swept in from
the west with a ferocity known only to the gods"
These are called variables, and they enable us to store lots of text or numbers. We use them to contain our story, and then when we want to use them, we use the print function like this:
The print function looks inside the variable and prints its contents on the screen, which is really handy and means that we only have to write the story once and we can re-use it as many times as we wish.
Python is a high-level general purpose programming language that offers multiple paradigms like object-orientation, and structural and functional programming for software development. It works on cross-platform operating systems and can be used...
Python is a high-level general purpose programming language that offers multiple paradigms like object-orientation, and structural and functional programming for software development. It works on cross-platform operating systems and can be used across to develop a wide range of applications including those intended for image processing, text processing, web, and enterprise level using scientific, numeric and data from network. BitTorrent, YouTube, Dropbox, Deluge, Cinema 4D and Bazaar are a few globally-used applications based on Python.
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Applications of Python
1. GUI-Based Desktop Applications:
Python has simple syntax, modular architecture, rich text processing tools and the ability to work on multiple operating systems which make it a desirable choice for developing desktop-based applications. There are various GUI toolkits like wxPython, PyQt or PyGtk available which help developers create highly functional Graphical User Interface (GUI). The various applications developed using Python includes:
Image Processing and Graphic Design Applications:
Python has been used to make 2D imaging software such as Inkscape, GIMP, Paint Shop Pro and Scribus. Further, 3D animation packages, like Blender, 3ds Max, Cinema 4D, Houdini, Lightwave and Maya, also use Python in variable proportions.
Scientific and Computational Applications:
The higher speeds, productivity and availability of tools, such as Scientific Python and Numeric Python, have resulted in Python becoming an integral part of applications involved in computation and processing of scientific data. 3D modeling software, such as FreeCAD, and finite element method software, such as Abaqus, are coded in Python.
Python has various modules, libraries and platforms that support development of games. For example, PySoy is a 3D game engine supporting Python 3, and PyGame provides functionality and a library for game development. There have been numerous games built using Python including Civilization-IV, Disney’s Toontown Online, Vega Strike etc.
2. Web Frameworks and Web Applications:
Python has been used to create a variety of web-frameworks including CherryPy, Django, TurboGears, Bottle, Flask etc. These frameworks provide standard libraries and modules which simplify tasks related to content management, interaction with database and interfacing with different internet protocols such as HTTP, SMTP, XML-RPC, FTP and POP. Plone, a content management system; ERP5, an open source ERP which is used in aerospace, apparel and banking; Odoo – a consolidated suite of business applications; and Google App engine are a few of the popular web applications based on Python.
3. Enterprise and Business Applications:
With features that include special libraries, extensibility, scalability and easily readable syntax, Python is a suitable coding language for customizing larger applications. Reddit, which was originally written in Common Lips, was rewritten in Python in 2005. Python also contributed in a large part to functionality in YouTube.
4. Operating Systems:
Python is often an integral part of Linux distributions. For instance, Ubuntu’s Ubiquity Installer, and Fedora’s and Red Hat Enterprise Linux’s Anaconda Installer are written in Python. Gentoo Linux makes use of Python for Portage, its package management system.
5. Language Development:
Python’s design and module architecture has influenced development of numerous languages. Boo language uses an object model, syntax and indentation, similar to Python. Further, syntax of languages like Apple’s Swift, CoffeeScript, Cobra, and OCaml all share similarity with Python.
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Besides being quick and easy to learn, Python also has the open source advantage of being free with the support of a large community. This makes it the preferred choice for prototype development. Further, the agility, extensibility and scalability and ease of refactoring code associated with Python allow faster development from initial prototype.
Since its origin in 1989, Python has grown to become part of a plethora of web-based, desktop-based, graphic design, scientific, and computational applications. With Python available for Windows, Mac OS X and Linux / UNIX, it offers ease of development for enterprises. Additionally, the latest release Python 3.4.3 builds on the existing strengths of the language, with drastic improvement in Unicode support, among other new features.