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@@ -1,49 +1,20 @@
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# Installation
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-## For Linux and BSD users
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-
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-If you are using a distribution of Linux such as Ubuntu, Fedora, OpenSUSE, Debian, CentOS or {put your choice here}, or a BSD system such as FreeBSD, then it is most likely you already have Python installed on your system.
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-
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-To test if you have Python already installed on your BSD or Linux box, open a shell program (like `gnome-terminal`) and enter the command `python -V` as shown below.
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-
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-~~~
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-$ python -V
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-Python 2.7.2
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-~~~
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-
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-*Note:* `$` is the prompt of the shell. It will be different for you depending on the settings of the operating system on your computer, hence I will indicate the prompt by just the `$` symbol.
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-
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-If you see some version information like the one shown above, then you have Python installed already.
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-
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-However, if you get a message like this one:
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-
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-~~~
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-$ python -V
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-bash: python: command not found
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-~~~
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-
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-Then you don't have Python installed. This is highly unlikely but possible.
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-
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-In this case, you have two ways of installing Python on your system.
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-
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-- Install the binary packages using the package management software that comes with your OS, such as `apt-get` in Ubuntu/Debian and other Debian-based distros, `yum` in Fedora, `pkg_add` in FreeBSD, etc. Note that you will need an internet connection to use this method. Alternatively, you can download the binaries from somewhere else and then copy to your computer and install it.
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-- You can compile Python from the [source code](http://www.python.org/download/) and install it. The compilation instructions are provided at the website.
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-
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-## For Windows Users
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+## Installation on Windows
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Visit <http://www.python.org/download/> and download the latest version. The installation is just like any other Windows-based software.
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-*Caution:* When you are given the option of unchecking any "optional" components, don't uncheck any! Some of these components can be useful for you, especially IDLE.
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+Caution
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-An interesting fact is that majority of Python downloads are by Windows users. Of course, this doesn't give the complete picture since almost all Linux users will have Python installed already on their systems by default.
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+: When you are given the option of unchecking any "optional" components, don't uncheck any.
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### DOS Prompt
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If you want to be able to use Python from the Windows command line i.e. the DOS prompt, then you need to set the PATH variable appropriately.
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-For Windows 2000, XP, 2003 , click on `Control Panel` --- `System` --- `Advanced` --- `Environment Variables`. Click on the variable named `PATH` in the 'System Variables' section, then select `Edit` and add `;C:\Python27` to the end of what is already there. Of course, use the appropriate directory name.
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+For Windows 2000, XP, 2003 , click on `Control Panel` --- `System` --- `Advanced` --- `Environment Variables`. Click on the variable named `PATH` in the 'System Variables' section, then select `Edit` and add `;C:\Python33` (please verify that this folder exists, it will be different for newer versions of Python) to the end of what is already there. Of course, use the appropriate directory name.
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-For older versions of Windows, open the file `C:\AUTOEXEC.BAT` and add the line '`PATH=%PATH%;C:\Python27`' (without the quotes) and restart the system. For Windows NT, use the `AUTOEXEC.NT` file.
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+For older versions of Windows, open the file `C:\AUTOEXEC.BAT` and add the line '`PATH=%PATH%;C:\Python33`' (without the quotes) and restart the system. For Windows NT, use the `AUTOEXEC.NT` file.
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For Windows Vista:
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@@ -58,16 +29,59 @@ For Windows Vista:
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For Windows 7:
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#. Right click on Computer from your desktop and select properties or Click Start and choose Control Panel --- System and Security --- System. Click on Advanced system settings on the left and then click on the Advanced tab. At the bottom click on Environment Variables and under System variables, look for the PATH variable, select and then press Edit.
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-#. Go to the end of the line under Variable value and append `;C:\Python27`.
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-#. If the value was `%SystemRoot%\system32;` It will now become `%SystemRoot%\system32;C:\Python27`
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+#. Go to the end of the line under Variable value and append `;C:\Python33`.
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+#. If the value was `%SystemRoot%\system32;` It will now become `%SystemRoot%\system32;C:\Python33`
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#. Click ok and you are done. No restart is required.
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-## For Mac OS X Users
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+### Running Python prompt on Windows
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+
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+For Windows users, you can run the interpreter in the command line if you have [set the `PATH` variable appropriately](#dos-prompt).
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+
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+To open the terminal in Windows, click the start button and click 'Run'. In the dialog box, type `cmd` and press enter key.
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+
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+Then, type `python3 -V` and ensure there are no errors.
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+
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+## Installation on Mac OS X
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+
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+For Mac OS X users, open the terminal by pressing `Command+Space` keys (to open Spotlight search), type `Terminal` and press enter key.
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+
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+Install [Homebrew](http://mxcl.github.com/homebrew/) by running:
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+
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+~~~
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+ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"
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+~~~
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+
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+Then install Python 3 using:
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+
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+~~~
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+brew install python3
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+~~~
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+
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+Now, run `python3 -V` and ensure there are no errors.
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+
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+## Installation on Linux
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+
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+For Linux users, open the terminal by opening the `Terminal` application or by pressing `Alt + F2` and entering `gnome-terminal`. If that doesn't work, please refer the documentation or forums of your particular Linux distribution.
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+
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+Next, we have to install the `python3` package. For example, on Ubuntu, you can use [`sudo apt-get install python3`](http://packages.ubuntu.com/search?keywords=python3&searchon=names&suite=all§ion=all). Please check the documentation or forums of the Linux distribution that you have installed for the correct package manager command to run.
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+
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+Once you have finished the installation, run the `python3 -V` command in a shell and you should see the version of Python on the screen:
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+
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+~~~
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+$ python3 -V
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+Python 3.3.0
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+~~~
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+
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+Note
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+
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+: `$` is the prompt of the shell. It will be different for you depending on the settings of the operating system on your computer, hence I will indicate the prompt by just the `$` symbol.
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+
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+Default in new versions of your distribution?
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-Mac OS X Users will find Python already installed on their system. Open the `Terminal.app` and run `python -V` and follow the advice in the above Linux and BSD section.
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+: Newer distributions such as [Ubuntu 12.10 are making Python 3 the default version](https://wiki.ubuntu.com/Python/3), so check if it is already installed.
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## Summary
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-For Linux and BSD systems, you probably already have Python installed on your system. Otherwise, you can install it using the package management software that comes with your distribution. For a Windows system, installing Python is as easy as downloading the installer and double-clicking on it. From now on, we will assume that you have Python installed on your system.
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+From now on, we will assume that you have Python 3 installed on your system.
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-Next, we will write our first Python program.
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+Next, we will write our first Python 3 program.
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Swaroop C H
