Pythonpath is sometimes preset by the python installer. 2 pythonstartup it contains the path of an initialization file containing writing Python source code. It is executed every time you start the interpreter. It is named as in Unix and it contains commands that load utilities or modify pythonpath. 3 pythoncaseok it is used in Windows to instruct Python to find the first case-insensitive match in an import statement. Set this variable to any value to activate. 4 pythonhome it is an alternative module search path. It is usually embedded in the pythonstartup or pythonpath directories to make switching module libraries easy. Running Python There are three different ways to start Python Interactive interpreter you can start Python from Unix, dos, or any other system that provides you a command-line interpreter or shell window.
Setting path at Unix/Linux to add the python directory to the path for review a particular session in Unix In the csh shell type setenv path "path usr/local/bin/python" and press Enter. In the bash shell (Linux) type export and press Enter. In the sh or ksh shell type and press Enter. Note /usr/local/bin/python is the path of the python directory setting path at Windows to add the python directory to the path for a particular session in Windows At the command prompt type path path;C:Python and press Enter. Note c:Python is the path of the python directory python Environment Variables Here are important environment variables, which can be recognized by python. Variable description 1 pythonpath it has a role similar to path. This variable tells the python interpreter where to locate the module files imported into a program. It should include the python source library directory and the directories containing Python source code.
For older Mac os's before mac os.3 (released in 2003 macPython is available. Jack jansen maintains it and you can have full access to the entire documentation at his website. You can find complete installation details for Mac os installation. Setting up path programs and other executable files can be in many directories, so operating systems provide a search path that lists the directories that the os searches for executables. The path is stored in an environment variable, which is a named string maintained by the operating system. This variable contains information available to the command shell and other programs. The path variable is named as path in Unix or Path in Windows (Unix is case sensitive; Windows is not). In Mac os, the installer handles the path details. To invoke the python interpreter from any particular directory, you must add the python directory to your path.
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Editing the modules/Setup file if you want to customize some options. Run./configure homework script make make install This installs Python at standard location /usr/local/bin and its libraries at /usr/local/lib/pythonXX where xx is the version of Python. Windows Installation Here are the steps to install Python on Windows machine. Follow the link for the windows installer i file where xyz is the version you need to install. To use this installer i, the windows system must support Microsoft Installer.0. Save the installer file to your local machine and then run it to find out if your machine supports msi.
Run the downloaded file. This brings up the python install wizard, which is really easy to use. Just accept the default settings, wait until the install is finished, and you are done. Macintosh Installation Recent Macs come with Python installed, but it may be several years out of date. Org/download/mac/ for instructions on getting the current version along with extra tools writing to support development on the mac.
Unix (Solaris, linux, Freebsd, aix, hp/ux, sunos, irix, etc.). Win 9x/NT/2000, macintosh (Intel, ppc, 68K) OS/2 dos (multiple versions) Palmos nokia mobile phones Windows ce acorn/risc os beos amiga vms/Openvms qnx vxWorks Psion Python has also been ported to the java and. Net virtual machines Getting Python The most up-to-date and current source code, binaries, documentation, news, etc., is available on the official website of Python thon. Org/ you can download Python documentation from thon. The documentation is available in html, pdf, and PostScript formats. Installing Python Python distribution is available for a wide variety of platforms.
You need to download only the binary code applicable for your platform and install Python. If the binary code for your platform is not available, you need a c compiler to compile the source code manually. Compiling the source code offers more flexibility in terms of choice of features that you require in your installation. Here is a quick overview of installing Python on various platforms Unix and Linux Installation Here are the simple steps to install Python on Unix/Linux machine. Open a web browser and go to thon. Follow the link to download zipped source code available for Unix/Linux. Download and extract files.
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Apart from the above-mentioned features, python has a big list of good features, few are listed below. It supports functional pdf and structured programming methods as well as oop. It can be used as a scripting language or can be compiled to byte-code for building large applications. It provides very high-level dynamic data types and supports dynamic type checking. It supports automatic garbage collection. It can be easily integrated with c, c, com, activex, corba, and java. Python is available on a wide variety of platforms including Linux and Mac. Let's understand how to set up our Python environment. Local Environment Setup, open a terminal window and type "python" to find essays out if it is already installed and which version is installed.
and debugging of snippets of code. Python can run on a wide variety of hardware platforms and has the same interface on all platforms. Extendable, you can add low-level modules to the python interpreter. These modules enable programmers to add to or customize their tools to be more efficient. Databases, python provides interfaces to all major commercial databases. Gui programming, python supports gui applications that can be created and ported to many system calls, libraries and windows systems, such as Windows mfc, macintosh, and the x window system of Unix. Scalable, python provides a better structure and support for large programs than shell scripting.
Python is a beginner's Language, python is a great language for the beginner-level programmers and supports the development of a wide range of applications from simple text processing to www browsers to games. Python was developed by guido van Rossum in the late eighties and early nineties at the national Research Institute for Mathematics and Computer Science in the netherlands. Python is derived from many other languages, including abc, modula-3, c, c, algol-68, SmallTalk, and Unix shell and other scripting languages. Like perl, python source code is now available under the gnu general Public License (GPL). Python is now maintained by a core development team dubai at the institute, although guido van Rossum still holds a vital role in directing its progress. Python features, python's features include, easy-to-learn, python has few keywords, simple structure, and a clearly defined syntax. This allows the student to pick up the language quickly. Python code is more clearly defined and visible to the eyes.
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Advertisements, previous Page, next Page, python is a high-level, interpreted, interactive and object-oriented scripting language. Python is designed to be highly readable. It uses English essay keywords frequently where as other languages use punctuation, and it has fewer syntactical constructions than other languages. Python is Interpreted, python is processed at runtime by the interpreter. You do not need to compile your program before executing. This is similar to perl and php. You can actually sit at a python prompt and interact with the interpreter directly to write your programs. Python is Object-Oriented, python supports Object-Oriented style or technique of programming that encapsulates code within objects.